Call Now to Set Up Tutoring:

(888) 888-0446

Calculus 3 : Dot Product

Study concepts, example questions & explanations for Calculus 3

Create An Account

All Calculus 3 Resources

6 Diagnostic Tests 373 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #81 : Dot Product

Find the dot product: $\left \langle -2,9\right \rangle\cdot \left \langle -3,7\right \rangle$

Possible Answers:

$\left \langle -5,16\right \rangle$

$\left \langle 6,63\right \rangle$

Correct answer:

Explanation:

Write the dot product formula.

$a\cdot b = a_1b_1+a_2b_2$

Substitute the values of the vectors and solve. The dot product will result in a number, not a vector.

(-2)(-3) + (9)(7) = 6 +63 =69

The dot product is:

Report an Error

Example Question #82 : Dot Product

Find the length $\small ||v||$ of the vector $\small v=(1,\sqrt{3})$ .

Possible Answers:

$\small \small \small ||v||=1+\sqrt{3}$

$\small \small \small ||v||=4$

$\small \small \small ||v||=\sqrt{1+\sqrt{3}}$

$\small \small ||v||=2$

Correct answer:

$\small \small ||v||=2$

Explanation:

To find the length $\small ||v||$ of the vector $\small v=(1,\sqrt{3})$ , we take the square root of the dot product $\small v\cdot v$ :

$\small \small ||v||=\sqrt{v\cdot v}=\sqrt{1^2+\sqrt{3}^2}=\sqrt{4}=2$

Report an Error

Example Question #83 : Dot Product

Find the length $\small ||v||$ of the vector $\small \small v=(15,12)$ .

Possible Answers:

$\small \small \small ||v||=\sqrt{369}$

$\small \small \small ||v||=27$

$\small \small \small ||v||=369$

$\small \small \small ||v||=\sqrt{370}$

Correct answer:

$\small \small \small ||v||=\sqrt{369}$

Explanation:

To find the length $\small ||v||$ of the vector $\small \small v=(15,12)$ , we take the square root of the dot product $\small v\cdot v$ :

$\small \small \small ||v||=\sqrt{v\cdot v}=\sqrt{15^2+12^2}=\sqrt{225+144}=\sqrt{369}$

Report an Error

Example Question #84 : Dot Product

Find the length $\small ||v||$ of the vector $\small \small \small v=(5,5)$ .

Possible Answers:

$\small \small ||v||=5\sqrt{2}$

$\small \small \small ||v||=50$

$\small \small \small ||v||=10$

$\small \small \small ||v||=2\sqrt{5}$

Correct answer:

$\small \small ||v||=5\sqrt{2}$

Explanation:

To find the length $\small ||v||$ of the vector $\small \small \small v=(5,5)$ , we take the square root of the dot product $\small v\cdot v$ :

$\small \small \small \small \small ||v||=\sqrt{v\cdot v}=\sqrt{5^2+5^2}=\sqrt{25+25}=\sqrt{25\cdot 2}=5\sqrt{2}$

Report an Error

Example Question #85 : Dot Product

Find the length $\small ||v||$ of the vector $\small \small \small \small v=(3,-1)$ .

Possible Answers:

$\small \small \small ||v||=4$

$\small \small ||v||=\sqrt{10}$

$\small \small \small ||v||=10$

$\small \small \small ||v||=2$

Correct answer:

$\small \small ||v||=\sqrt{10}$

Explanation:

To find the length $\small ||v||$ of the vector $\small \small \small \small v=(3,-1)$ , we take the square root of the dot product $\small v\cdot v$ :

$\small \small \small \small \small \small ||v||=\sqrt{v\cdot v}=\sqrt{3^2+(-1)^2}=\sqrt{9+1}=\sqrt{10}$

Report an Error

Example Question #86 : Dot Product

Find the length $\small ||v||$ of the vector $\small \small \small \small \small v=(\pi,\pi^4)$ .

Possible Answers:

$\small \small \small ||v||=\pi+\pi^4$

$\small \small ||v||=\pi\sqrt{1+\pi^6}$

$\small \small \small ||v||=\pi^2+\pi^6$

$\small \small \small ||v||=\sqrt{\pi+\pi^4}$

Correct answer:

$\small \small ||v||=\pi\sqrt{1+\pi^6}$

Explanation:

To find the length $\small ||v||$ of the vector $\small \small \small \small \small v=(\pi,\pi^4)$ , we take the square root of the dot product $\small v\cdot v$ :

$\small \small \small \small \small \small \small ||v||=\sqrt{v\cdot v}=\sqrt{\pi^2+(\pi^4)^2}=\sqrt{\pi^2+\pi^8}=\sqrt{\pi^2(1+\pi^6)}=\pi\sqrt{1+\pi^6}$

Report an Error

Example Question #87 : Dot Product

Find the length $\small ||v||$ of the vector $\small \small \small \small \small \small v=(\sqrt{3},\sqrt{5})$ .

Possible Answers:

$\small \small ||v||=2\sqrt{2}$

$\small \small \small ||v||=\sqrt{3}+\sqrt{5}$

$\small \small \small ||v||=8$

$\small \small \small ||v||=\sqrt{\sqrt{3}+\sqrt{5}}$

Correct answer:

$\small \small ||v||=2\sqrt{2}$

Explanation:

To find the length $\small ||v||$ of the vector $\small \small \small \small \small \small v=(\sqrt{3},\sqrt{5})$ , we take the square root of the dot product $\small v\cdot v$ :

$\small \small |v||=\sqrt{v\cdot v}=\sqrt{\sqrt{3}^2+\sqrt{5}^2}=\sqrt{3+5}=\sqrt{8}=\sqrt{4\cdot 2}=2\sqrt{2}$

Report an Error

Example Question #88 : Dot Product

Find the length $\small ||v||$ of the vector $\small \small \small \small \small \small \small v=(1,3,7)$ .

Possible Answers:

$\small \small \small ||v||=\sqrt{11}$

$\small \small \small ||v||=59$

$\small \small \small ||v||=11$

$\small \small ||v||=\sqrt{59}$

Correct answer:

$\small \small ||v||=\sqrt{59}$

Explanation:

To find the length $\small ||v||$ of the vector $\small \small \small \small \small \small \small v=(1,3,7)$ , we take the square root of the dot product $\small v\cdot v$ :

$\small \small \small |v||=\sqrt{v\cdot v}=\sqrt{1^2+3^2+7^2}=\sqrt{1+9+49}=\sqrt{59}$

Report an Error

Example Question #89 : Dot Product

Find the length $\small ||v||$ of the vector $\small \small \small \small \small \small \small \small v=(\pi,\pi^2,\pi^6)$ .

Possible Answers:

$\small \small \small ||v||=\sqrt{\pi^2+\pi^{12}}$

$\small \small \small ||v||=1+\pi^2+\pi^{10}$

$\small \small ||v||=\pi\sqrt{1+\pi^2+\pi^{10}}$

$\small \small \small ||v||=\pi^2+\pi^4+\pi^{12}$

Correct answer:

$\small \small ||v||=\pi\sqrt{1+\pi^2+\pi^{10}}$

Explanation:

To find the length $\small ||v||$ of the vector $\small \small \small \small \small \small \small \small v=(\pi,\pi^2,\pi^6)$ , we take the square root of the dot product $\small v\cdot v$ :

$\small \small \small \small \small |v||=\sqrt{v\cdot v}=\sqrt{\pi^2+(\pi^2)^2+(\pi^6])^2}=\sqrt{\pi^2+\pi^4+\pi^{12}}=\sqrt{\pi^2(1+\pi^2+\pi^{10})}$

$\small =\pi\sqrt{1+\pi^2+\pi^{10}}$

Report an Error

Example Question #90 : Dot Product

Find the length $\small \small ||v||$ of the vector $\small \small \small \small \small \small \small \small \small v=(e,\pi,1)$ .

Possible Answers:

$\small \small \small ||v||=\sqrt{e^2+\pi^2+1}$

$\small \small \small \small ||v||=e^2+\pi^2+1$

$\small \small \small \small ||v||=e+\pi+1$

$\small \small \small \small ||v||=\frac{1}{2}(e+\pi+1)$

Correct answer:

$\small \small \small ||v||=\sqrt{e^2+\pi^2+1}$

Explanation:

To find the length $\small \small ||v||$ of the vector $\small \small \small \small \small \small \small \small \small v=(e,\pi,1)$ , we take the square root of the dot product $\small v\cdot v$ :

$\small \small \small \small \small |v||=\sqrt{v\cdot v}=\sqrt{e^2+\pi^2+1^2}=\sqrt{e^2+\pi^2+1}$

Report an Error

View Calculus 3 Tutors

Harmon Joseph
Certified Tutor

Texas State University, Bachelor's (in progress), Pure Mathematics and Applied Mathematics.

View Calculus 3 Tutors

Bertha
Certified Tutor

California Institute of Technology, Bachelor's (in progress), Chemical Engineering.

View Calculus 3 Tutors

Asad
Certified Tutor

NED University of Engineering and Technology, Bachelor of Science, Electrical Engineering. University of Cincinnati-Main Camp...

All Calculus 3 Resources

6 Diagnostic Tests 373 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

LSAT Tutors in San Francisco-Bay Area, Reading Tutors in Boston, Computer Science Tutors in Seattle, French Tutors in Seattle, MCAT Tutors in Philadelphia, Spanish Tutors in San Diego, GMAT Tutors in San Diego, MCAT Tutors in Dallas Fort Worth, MCAT Tutors in Atlanta, Physics Tutors in Chicago

Popular Courses & Classes

GMAT Courses & Classes in Los Angeles, ACT Courses & Classes in Atlanta, GMAT Courses & Classes in Atlanta, ISEE Courses & Classes in San Diego, GRE Courses & Classes in San Diego, SAT Courses & Classes in Denver, SSAT Courses & Classes in Washington DC, SSAT Courses & Classes in Seattle, ACT Courses & Classes in San Francisco-Bay Area, ACT Courses & Classes in Houston

Popular Test Prep

MCAT Test Prep in San Francisco-Bay Area, GMAT Test Prep in Los Angeles, SSAT Test Prep in Denver, ISEE Test Prep in Houston, SAT Test Prep in Houston, GRE Test Prep in Los Angeles, SSAT Test Prep in Phoenix, GMAT Test Prep in San Diego, GRE Test Prep in Chicago, SAT Test Prep in Miami

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

Calculus 3 : Dot Product

Study concepts, example questions & explanations for Calculus 3

All Calculus 3 Resources

Example Questions

Example Question #81 : Dot Product

Example Question #82 : Dot Product

Example Question #83 : Dot Product

Example Question #84 : Dot Product

Example Question #85 : Dot Product

Example Question #86 : Dot Product

Example Question #87 : Dot Product

Example Question #88 : Dot Product

Example Question #89 : Dot Product

Example Question #90 : Dot Product

All Calculus 3 Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: