Calculus 2 : Vector Form

Study concepts, example questions & explanations for Calculus 2

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Example Questions

Example Question #91 : Vector Form

What is the vector form of \displaystyle -6i+j+k?

Possible Answers:

\displaystyle \left \langle -6,1,1\right \rangle

\displaystyle \left \langle -6,1,-1\right \rangle

\displaystyle \left \langle 6,1,-1\right \rangle

\displaystyle \left \langle 6,-1,1\right \rangle

\displaystyle \left \langle 6,1,1\right \rangle

Correct answer:

\displaystyle \left \langle -6,1,1\right \rangle

Explanation:

In order to derive the vector form, we must map the , , -coordinates to their corresponding , , and coefficients.

That is, given, the vector form is  .

So for \displaystyle -6i+j+k, we can derive the vector form \displaystyle \left \langle -6,1,1\right \rangle.

Example Question #91 : Vector Form

What is the vector form of \displaystyle 3i-k?

Possible Answers:

\displaystyle \left \langle 3,0,-1\right \rangle

\displaystyle \left \langle 3,-1,0\right \rangle

\displaystyle \left \langle -3,0,-1\right \rangle

\displaystyle \left \langle 3,0,1\right \rangle

\displaystyle \left \langle -3,0,1\right \rangle

Correct answer:

\displaystyle \left \langle 3,0,-1\right \rangle

Explanation:

In order to derive the vector form, we must map the -coordinates to their corresponding , and coefficients.

That is, given, the vector form is  .

So for \displaystyle 3i-k, we can derive the vector form \displaystyle \left \langle 3,0,-1\right \rangle.

Example Question #223 : Ap Calculus Bc

Given points \displaystyle (4,2,-2) and \displaystyle (7,1,0), what is the vector form of the distance between the points?

Possible Answers:

\displaystyle \left \langle 3,-1,2\right \rangle

\displaystyle \left \langle -3,1,-2\right \rangle

\displaystyle \left \langle 3,1,2\right \rangle

\displaystyle \left \langle 3,1,-2\right \rangle

\displaystyle \left \langle -3,1,2\right \rangle

Correct answer:

\displaystyle \left \langle 3,-1,2\right \rangle

Explanation:

In order to derive the vector form of the distance between two points, we must find the difference between the , , and elements of the points.

That is, for any point and , the distance is the vector .

Subbing in our original points \displaystyle (4,2,-2) and \displaystyle (7,1,0),  we get:

\displaystyle v=\left \langle 7-4,1-2,0-(-2)\right \rangle

\displaystyle v=\left \langle 3,-1,2\right \rangle

Example Question #91 : Vector Form

Given points \displaystyle (2,7,-6) and \displaystyle (1,2,3), what is the vector form of the distance between the points?

 

Possible Answers:

\displaystyle \left \langle 1,-5,-9\right \rangle

\displaystyle \left \langle -1,5,-9\right \rangle

\displaystyle \left \langle -1,-5,-9\right \rangle

\displaystyle \left \langle -1,-5,9\right \rangle

\displaystyle \left \langle 1,5,9\right \rangle

Correct answer:

\displaystyle \left \langle -1,-5,9\right \rangle

Explanation:

In order to derive the vector form of the distance between two points, we must find the difference between the , , and elements of the points.

That is, for any point and , the distance is the vector .

Subbing in our original points \displaystyle (2,7,-6) and \displaystyle (1,2,3),  we get:

 \displaystyle v=\left \langle 1-2,2-7,3-(-6)\right \rangle

\displaystyle v=\left \langle -1,-5,9\right \rangle

Example Question #441 : Parametric, Polar, And Vector

What is the vector form of \displaystyle -i+2j+10k?

Possible Answers:

\displaystyle \left \langle 1,2,-10\right \rangle

\displaystyle \left \langle 1,2,10\right \rangle

\displaystyle \left \langle -1,2,10\right \rangle

\displaystyle \left \langle 1,-2,-10\right \rangle

\displaystyle \left \langle 1,-2,10\right \rangle

Correct answer:

\displaystyle \left \langle -1,2,10\right \rangle

Explanation:

In order to derive the vector form, we must map the , , -coordinates to their corresponding , , and coefficients.

That is, given, the vector form is .

So for \displaystyle -i+2j+10k, we can derive the vector form \displaystyle \left \langle -1,2,10\right \rangle.

Example Question #92 : Vector Form

What is the vector form of \displaystyle i+k?

Possible Answers:

\displaystyle \left \langle 1,1,0\right \rangle

\displaystyle \left \langle 0,1,1\right \rangle

\displaystyle \left \langle -1,0,1\right \rangle

\displaystyle \left \langle 1,0,-1\right \rangle

\displaystyle \left \langle 1,0,1\right \rangle

Correct answer:

\displaystyle \left \langle 1,0,1\right \rangle

Explanation:

In order to derive the vector form, we must map the -coordinates to their corresponding , and  coefficients.

That is, given , the vector form is .

So for \displaystyle i+k, we can derive the vector form \displaystyle \left \langle 1,0,1\right \rangle.

Example Question #32 : Linear Algebra

What is the vector form of \displaystyle j+8k?

Possible Answers:

\displaystyle \left \langle 0,1,8\right \rangle

\displaystyle \left \langle 0,8,1\right \rangle

None of the above

\displaystyle \left \langle 1,8,0\right \rangle

\displaystyle \left \langle 1,0,8\right \rangle

Correct answer:

\displaystyle \left \langle 0,1,8\right \rangle

Explanation:

Given \displaystyle j+8k, we need to map the \displaystyle i\displaystyle j, and \displaystyle k coefficients back to their corresponding \displaystyle x\displaystyle y, and \displaystyle z-coordinates.

Thus the vector form of \displaystyle j+8k is \displaystyle \left \langle 0,1,8\right \rangle.

Example Question #31 : Linear Algebra

Express \displaystyle 4i-9j in vector form.

Possible Answers:

\displaystyle \left \langle 4,0,-9\right \rangle

\displaystyle \left \langle 0,4,-9\right \rangle

\displaystyle \left \langle 4,9,0\right \rangle

\displaystyle \left \langle 4,-9,0\right \rangle

\displaystyle \left \langle 4,-9\right \rangle

Correct answer:

\displaystyle \left \langle 4,-9,0\right \rangle

Explanation:

In order to express \displaystyle 4i-9j in vector form, we must use the coefficients of \displaystyle i, j,and \displaystyle k to represent the \displaystyle x-, \displaystyle y-, and \displaystyle z-coordinates of the vector.

Therefore, its vector form is 

\displaystyle \left \langle 4,-9,0\right \rangle.

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