Precalculus : Geometric Vectors

Study concepts, example questions & explanations for Precalculus

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Example Questions

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Example Question #171 : Matrices And Vectors

Subtract:  

Possible Answers:

Correct answer:

Explanation:

Subtract the first value of the first vector, and the second value of the first vector with the second value of the second vector.

Double negative signs are converted to a positive sign.

Example Question #172 : Matrices And Vectors

Simplify:  

Possible Answers:

Correct answer:

Explanation:

The dimensions of the vectors are not the same.  Placeholders cannot be added to a vector.  Therefore, the values of the vectors cannot be added.

The correct answer is:  

Example Question #21 : Evaluate Geometric Vectors

Find the norm of the vector .

Possible Answers:

Correct answer:

Explanation:

We find the norm of a vector by finding the sum of each element squared and then taking the square root.

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Example Question #22 : Evaluate Geometric Vectors

Find the norm of the vector .

Possible Answers:

Correct answer:

Explanation:

We find the norm of a vector by finding the sum of each component squared and then taking the square root of that sum.

Example Question #23 : Evaluate Geometric Vectors

Find the norm of the vector: 

Possible Answers:

Correct answer:

Explanation:

The norm of a vector is also known as the length of the vector. The norm is given by the formula: 

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Here, we have

,

the correct answer.

Example Question #24 : Evaluate Geometric Vectors

Find the norm of vector .

Possible Answers:

Correct answer:

Explanation:

Write the formula to find the norm, or the length the vector.

Substitute the known values of the vector and solve.

Example Question #25 : Evaluate Geometric Vectors

Find the norm (magnitude) of the following vector:

Possible Answers:

Correct answer:

Explanation:

Use the following equation to find the magnitude of a vector:

In this case we have:

So plug in our values:

So:

Example Question #26 : Evaluate Geometric Vectors

Find the product of the vector  and the scalar .

Possible Answers:

Correct answer:

Explanation:

When multiplying a vector by a scalar we multiply each component of the vector by the scalar and the result is a vector:

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