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Calculus 3 : Calculus 3

Study concepts, example questions & explanations for Calculus 3

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Example Questions

Example Question #1161 : Calculus 3

$\begin{align*}&\text{Calculate the limits of the function}\\&lim_{(x,y)\rightarrow(0-,0-)}\frac{(15x^{5})}{(18x^{3}y^{2} + 8x^{4}y + 4x^{5} + 3y^{5})}\\&\text{along the x-axis and the line, }y=x\end{align*}$

Possible Answers:

$\begin{align*}&\text{x-axis: }-\frac{45}{11}\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{5}{11}\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{5}{88}\end{align*}$

$\begin{align*}&\text{x-axis: }\frac{45}{11}\\&y=x:0\end{align*}$

Correct answer:

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{5}{11}\end{align*}$

Explanation:

$\begin{align*}&\text{To approach this problem, it is important to understand what}\\ &\text{it is asking. Along the x-axis, }x=0\text{. Let us make that substitution:}\\&\frac{(15(0)^{5})}{(18(0)^{3}y^{2} + 8(0)^{4}y + 4(0)^{5} + 3y^{5})}=\frac{0}{3y^{5}}\\&lim_{(0,y)\rightarrow(0-,0-)}\frac{0}{3y^{5}}=0\\&\text{We can make a similar substitution for }y=x:\\&lim_{(x,x)\rightarrow(0-,0-)}\frac{(15x^{5})}{(18x^{3}(x)^{2} + 8x^{4}(x) + 4x^{5} + 3(x)^{5})}=\frac{5}{11}\\&\text{As these two limits are different, the limit does not exist.}\end{align*}$

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Example Question #1162 : Calculus 3

$\begin{align*}&\text{Calculate the limits of the function}\\&lim_{(x,y)\rightarrow(0-,0-)}\frac{(3x^{2}y)}{(8xy^{2} - 2x^{3} + 2y^{3})}\\&\text{along the x-axis and the line, }y=x\end{align*}$

Possible Answers:

$\begin{align*}&\text{x-axis: }-\frac{3}{2}\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{3}{8}\end{align*}$

$\begin{align*}&\text{x-axis: }\frac{15}{8}\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{3}{104}\end{align*}$

Correct answer:

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{3}{8}\end{align*}$

Explanation:

$\begin{align*}&\text{To approach this problem, it is important to understand what}\\ &\text{it is asking. Along the x-axis, }x=0\text{. Let us make that substitution:}\\&\frac{(3(0)^{2}y)}{(8(0)y^{2} - 2(0)^{3} + 2y^{3})}=\frac{0}{2y^{3}}\\&lim_{(0,y)\rightarrow(0-,0-)}\frac{0}{2y^{3}}=0\\&\text{We can make a similar substitution for }y=x:\\&lim_{(x,x)\rightarrow(0-,0-)}\frac{(3x^{2}(x))}{(8x(x)^{2} - 2x^{3} + 2(x)^{3})}=\frac{3}{8}\\&\text{As these two limits are different, the limit does not exist.}\end{align*}$

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Example Question #1163 : Calculus 3

$\begin{align*}&\text{Calculate the limits of the function}\\&lim_{(x,y)\rightarrow(0+,0-)}\frac{(x^{2}y^{4} - 20x^{3}y^{3})}{(12x^{4}y^{2} - 14xy^{5} + 3x^{6} + 2y^{6})}\\&\text{along the x-axis and the line, }y=x\end{align*}$

Possible Answers:

$\begin{align*}&\text{x-axis: }0\\&y=x:-\frac{19}{3}\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:-\frac{19}{39}\end{align*}$

$\begin{align*}&\text{x-axis: }-57\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }\frac{152}{3}\\&y=x:0\end{align*}$

Correct answer:

$\begin{align*}&\text{x-axis: }0\\&y=x:-\frac{19}{3}\end{align*}$

Explanation:

$\begin{align*}&\text{To approach this problem, it is important to understand what}\\ &\text{it is asking. Along the x-axis, }x=0\text{. Let us make that substitution:}\\&\frac{((0)^{2}y^{4} - 20(0)^{3}y^{3})}{(12(0)^{4}y^{2} - 14(0)y^{5} + 3(0)^{6} + 2y^{6})}=\frac{0}{2y^{6}}\\&lim_{(0,y)\rightarrow(0+,0-)}\frac{0}{2y^{6}}=0\\&\text{We can make a similar substitution for }y=x:\\&lim_{(x,x)\rightarrow(0+,0+)}\frac{(x^{2}(x)^{4} - 20x^{3}(x)^{3})}{(12x^{4}(x)^{2} - 14x(x)^{5} + 3x^{6} + 2(x)^{6})}=-\frac{19}{3}\\&\text{As these two limits are different, the limit does not exist.}\end{align*}$

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Example Question #1164 : Calculus 3

$\begin{align*}&\text{Calculate the limits of the function}\\&lim_{(x,y)\rightarrow(0+,0+)}\frac{(7x^{2}y^{4} + 4x^{5}y - x^{6})}{(5x^{2}y^{4} - x^{4}y^{2} - 20xy^{5} + 2x^{6} + 5y^{6})}\\&\text{along the x-axis and the line, }y=x\end{align*}$

Possible Answers:

$\begin{align*}&\text{x-axis: }-\frac{20}{9}\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }\frac{80}{9}\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:-\frac{2}{27}\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:-\frac{10}{9}\end{align*}$

Correct answer:

$\begin{align*}&\text{x-axis: }0\\&y=x:-\frac{10}{9}\end{align*}$

Explanation:

$\begin{align*}&\text{To approach this problem, it is important to understand what}\\ &\text{it is asking. Along the x-axis, }x=0\text{. Let us make that substitution:}\\&\frac{(7(0)^{2}y^{4} + 4(0)^{5}y - (0)^{6})}{(5(0)^{2}y^{4} - (0)^{4}y^{2} - 20(0)y^{5} + 2(0)^{6} + 5y^{6})}=\frac{0}{5y^{6}}\\&lim_{(0,y)\rightarrow(0+,0+)}\frac{0}{5y^{6}}=0\\&\text{We can make a similar substitution for }y=x:\\&lim_{(x,x)\rightarrow(0+,0+)}\frac{(7x^{2}(x)^{4} + 4x^{5}(x) - x^{6})}{(5x^{2}(x)^{4} - x^{4}(x)^{2} - 20x(x)^{5} + 2x^{6} + 5(x)^{6})}=-\frac{10}{9}\\&\text{As these two limits are different, the limit does not exist.}\end{align*}$

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Example Question #1165 : Calculus 3

$\begin{align*}&\text{Calculate the limits of the function}\\&lim_{(x,y)\rightarrow(0-,0-)}-\frac{(4x^{3}y^{2} + 7xy^{4} - 11x^{4}y)}{(2x^{5} + 3y^{5})}\\&\text{along the x-axis and the line, }y=x\end{align*}$

Possible Answers:

$\begin{align*}&\text{x-axis: }0\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }-\frac{20}{13}\\&y=x:-\frac{45}{19}\end{align*}$

$\begin{align*}&\text{x-axis: }-\frac{7}{3}\\&y=x:\frac{19}{7}\end{align*}$

$\begin{align*}&\text{x-axis: }6\\&y=x:-6\end{align*}$

Correct answer:

$\begin{align*}&\text{x-axis: }0\\&y=x:0\end{align*}$

Explanation:

$\begin{align*}&\text{To approach this problem, it is important to understand what}\\ &\text{it is asking. Along the x-axis, }x=0\text{. Let us make that substitution:}\\&-\frac{(4(0)^{3}y^{2} + 7(0)y^{4} - 11(0)^{4}y)}{(2(0)^{5} + 3y^{5})}=\frac{0}{3y^{5}}\\&lim_{(0,y)\rightarrow(0-,0-)}\frac{0}{3y^{5}}=0\\&\text{We can make a similar substitution for }y=x:\\&lim_{(x,x)\rightarrow(0-,0-)}-\frac{(4x^{3}(x)^{2} + 7x(x)^{4} - 11x^{4}(x))}{(2x^{5} + 3(x)^{5})}=0\\&\text{Since the two limits are equal, it's possible the limit exists.}\\&\text{Testing additional lines could prove or disprove this.}\end{align*}$

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Example Question #1166 : Calculus 3

$\begin{align*}&\text{Calculate the limits of the function}\\&lim_{(x,y)\rightarrow(0+,0+)}\frac{(19x^{2}y^{3} - 2x^{5})}{(7x^{2}y^{3} + 13xy^{4} + 3x^{5} + y^{5})}\\&\text{along the x-axis and the line, }y=x\end{align*}$

Possible Answers:

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{17}{24}\end{align*}$

$\begin{align*}&\text{x-axis: }\frac{17}{8}\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{17}{336}\end{align*}$

$\begin{align*}&\text{x-axis: }-\frac{187}{24}\\&y=x:0\end{align*}$

Correct answer:

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{17}{24}\end{align*}$

Explanation:

$\begin{align*}&\text{To approach this problem, it is important to understand what}\\ &\text{it is asking. Along the x-axis, }x=0\text{. Let us make that substitution:}\\&\frac{(19(0)^{2}y^{3} - 2(0)^{5})}{(7(0)^{2}y^{3} + 13(0)y^{4} + 3(0)^{5} + y^{5})}=\frac{0}{y^{5}}\\&lim_{(0,y)\rightarrow(0+,0+)}\frac{0}{y^{5}}=0\\&\text{We can make a similar substitution for }y=x:\\&lim_{(x,x)\rightarrow(0+,0+)}\frac{(19x^{2}(x)^{3} - 2x^{5})}{(7x^{2}(x)^{3} + 13x(x)^{4} + 3x^{5} + (x)^{5})}=\frac{17}{24}\\&\text{As these two limits are different, the limit does not exist.}\end{align*}$

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Example Question #1167 : Calculus 3

$\begin{align*}&\text{Calculate the limits of the function}\\&lim_{(x,y)\rightarrow(0+,0+)}\frac{(6xy^{2} - 13x^{2}y + 5x^{3})}{(xy^{2} - 20x^{2}y + 9x^{3} - 3y^{3})}\\&\text{along the x-axis and the line, }y=x\end{align*}$

Possible Answers:

$\begin{align*}&\text{x-axis: }\frac{32}{13}\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{1}{65}\end{align*}$

$\begin{align*}&\text{x-axis: }-\frac{16}{13}\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{2}{13}\end{align*}$

Correct answer:

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{2}{13}\end{align*}$

Explanation:

$\begin{align*}&\text{To approach this problem, it is important to understand what}\\ &\text{it is asking. Along the x-axis, }x=0\text{. Let us make that substitution:}\\&\frac{(6(0)y^{2} - 13(0)^{2}y + 5(0)^{3})}{((0)y^{2} - 20(0)^{2}y + 9(0)^{3} - 3y^{3})}=\frac{0}{3y^{3}}\\&lim_{(0,y)\rightarrow(0+,0+)}\frac{0}{3y^{3}}=0\\&\text{We can make a similar substitution for }y=x:\\&lim_{(x,x)\rightarrow(0+,0+)}\frac{(6x(x)^{2} - 13x^{2}(x) + 5x^{3})}{(x(x)^{2} - 20x^{2}(x) + 9x^{3} - 3(x)^{3})}=\frac{2}{13}\\&\text{As these two limits are different, the limit does not exist.}\end{align*}$

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Example Question #1168 : Calculus 3

$\begin{align*}&\text{Calculate the limits of the function}\\&lim_{(x,y)\rightarrow(0-,0-)}-\frac{(13x^{2}y^{4} - 19x^{5}y + 6x^{6})}{(2x^{6} + 3y^{6})}\\&\text{along the x-axis and the line, }y=x\end{align*}$

Possible Answers:

$\begin{align*}&\text{x-axis: }-\frac{40}{11}\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }-10\\&y=x:-\frac{29}{3}\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:-2\end{align*}$

Correct answer:

$\begin{align*}&\text{x-axis: }0\\&y=x:0\end{align*}$

Explanation:

$\begin{align*}&\text{To approach this problem, it is important to understand what}\\ &\text{it is asking. Along the x-axis, }x=0\text{. Let us make that substitution:}\\&-\frac{(13(0)^{2}y^{4} - 19(0)^{5}y + 6(0)^{6})}{(2(0)^{6} + 3y^{6})}=\frac{0}{3y^{6}}\\&lim_{(0,y)\rightarrow(0-,0-)}\frac{0}{3y^{6}}=0\\&\text{We can make a similar substitution for }y=x:\\&lim_{(x,x)\rightarrow(0-,0-)}-\frac{(13x^{2}(x)^{4} - 19x^{5}(x) + 6x^{6})}{(2x^{6} + 3(x)^{6})}=0\\&\text{Since the two limits are equal, it's possible the limit exists.}\\&\text{Testing additional lines could prove or disprove this.}\end{align*}$

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Example Question #1169 : Calculus 3

$\begin{align*}&\text{Calculate the limits of the function}\\&lim_{(x,y)\rightarrow(0-,0-)}\frac{(16x^{3}y^{3} - 15x^{4}y^{2})}{(12xy^{5} - 14x^{2}y^{4} + x^{6} + 5y^{6})}\\&\text{along the x-axis and the line, }y=x\end{align*}$

Possible Answers:

$\begin{align*}&\text{x-axis: }4\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{1}{4}\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{1}{80}\end{align*}$

$\begin{align*}&\text{x-axis: }-\frac{5}{4}\\&y=x:0\end{align*}$

Correct answer:

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{1}{4}\end{align*}$

Explanation:

$\begin{align*}&\text{To approach this problem, it is important to understand what}\\ &\text{it is asking. Along the x-axis, }x=0\text{. Let us make that substitution:}\\&\frac{(16(0)^{3}y^{3} - 15(0)^{4}y^{2})}{(12(0)y^{5} - 14(0)^{2}y^{4} + (0)^{6} + 5y^{6})}=\frac{0}{5y^{6}}\\&lim_{(0,y)\rightarrow(0-,0-)}\frac{0}{5y^{6}}=0\\&\text{We can make a similar substitution for }y=x:\\&lim_{(x,x)\rightarrow(0-,0-)}\frac{(16x^{3}(x)^{3} - 15x^{4}(x)^{2})}{(12x(x)^{5} - 14x^{2}(x)^{4} + x^{6} + 5(x)^{6})}=\frac{1}{4}\\&\text{As these two limits are different, the limit does not exist.}\end{align*}$

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Example Question #211 : Limits

$\begin{align*}&\text{Calculate the limits of the function}\\&lim_{(x,y)\rightarrow(0+,0-)}\frac{(9x^{2}y^{4} + 12xy^{5})}{(16x^{4}y^{2} + 19xy^{5} - 17x^{6} - 5y^{6})}\\&\text{along the x-axis and the line, }y=x\end{align*}$

Possible Answers:

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{21}{260}\end{align*}$

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{21}{13}\end{align*}$

$\begin{align*}&\text{x-axis: }\frac{252}{13}\\&y=x:0\end{align*}$

$\begin{align*}&\text{x-axis: }-\frac{336}{13}\\&y=x:0\end{align*}$

Correct answer:

$\begin{align*}&\text{x-axis: }0\\&y=x:\frac{21}{13}\end{align*}$

Explanation:

$\begin{align*}&\text{To approach this problem, it is important to understand what}\\ &\text{it is asking. Along the x-axis, }x=0\text{. Let us make that substitution:}\\&\frac{(9(0)^{2}y^{4} + 12(0)y^{5})}{(16(0)^{4}y^{2} + 19(0)y^{5} - 17(0)^{6} - 5y^{6})}=\frac{0}{5y^{6}}\\&lim_{(0,y)\rightarrow(0+,0-)}\frac{0}{5y^{6}}=0\\&\text{We can make a similar substitution for }y=x:\\&lim_{(x,x)\rightarrow(0+,0+)}\frac{(9x^{2}(x)^{4} + 12x(x)^{5})}{(16x^{4}(x)^{2} + 19x(x)^{5} - 17x^{6} - 5(x)^{6})}=\frac{21}{13}\\&\text{As these two limits are different, the limit does not exist.}\end{align*}$

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Calculus 3 : Calculus 3

Study concepts, example questions & explanations for Calculus 3

All Calculus 3 Resources

Example Questions

Example Question #1161 : Calculus 3

Example Question #1162 : Calculus 3

Example Question #1163 : Calculus 3

Example Question #1164 : Calculus 3

Example Question #1165 : Calculus 3

Example Question #1166 : Calculus 3

Example Question #1167 : Calculus 3

Example Question #1168 : Calculus 3

Example Question #1169 : Calculus 3

Example Question #211 : Limits

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