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Calculus 3 : Calculus 3

Study concepts, example questions & explanations for Calculus 3

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

Example Questions

Example Question #22 : Vector Addition

Find the sum of the two vectors

u=<8,5>

v=<10,2>

Possible Answers:

<2,-3>

<-2,3>

<80,10>

<18,7>

Correct answer:

<18,7>

Explanation:

The sum of two vectors

a=<a_1, a_2>

b=<b_1, b_2>

is defined as

a+b=<a_1+b_1, a_2+b_2>

For the vectors in this problem

u+v=<8+10,5+2>=<18,7>

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Example Question #23 : Vector Addition

Find the sum of the two vectors.

<7,10>+<8,13>

Possible Answers:

<38,28>

<-1,-3>

<15,23>

<1,3>

Correct answer:

<15,23>

Explanation:

The sum of two vectors
a=<a_1, a_2>
b=<b_1, b_2>
is defined as
a+b=<a_1+b_1, a_2+b_2>
For the vectors in this problem

<7,10>+<8,13>=<7+8,10+13>=<15,23>

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Example Question #231 : Vectors And Vector Operations

Find the sum of the vectors:

$\left \langle 3, 2, e^2 \right \rangle + \left \langle 0, 0, 1 \right \rangle + \left \langle 0, 0, 0 \right \rangle$

Possible Answers:

$\left \langle 0, 2, 0 \right \rangle$

$\left \langle 3, 2, e^2+1 \right \rangle$

$\left \langle 3, 0, e^2+1 \right \rangle$

$\left \langle 0, 0, 0 \right \rangle$

Correct answer:

$\left \langle 3, 2, e^2+1 \right \rangle$

Explanation:

To add vectors, we simply add their components. For example, $\left \langle x, y \right \rangle+\left \langle a, b \right \rangle=\left \langle x+a, y+b \right \rangle$ .

Our answer is

$\left \langle 3, 2, e^2+1 \right \rangle$

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Example Question #25 : Vector Addition

Compute the sum of the vectors $\left \langle 0,-2,1\right \rangle$ and $\left \langle 0,3,-7\right \rangle$ .

Possible Answers:

$\left \langle 0,-1,6\right \rangle$

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

$\left \langle 2,-1,0\right \rangle$

$\left \langle 0,1,-6\right \rangle$

Correct answer:

$\left \langle 0,1,-6\right \rangle$

Explanation:

The formula for the sum of two vectors a and b is $a+b=\left \langle a_1+b_1,a_2+b_2,a_3+b_3\right \rangle$ . Using the numbers we have, we get the resultant as $\left \langle 0+0,-2+3,1-7\right \rangle=\left \langle 0,1,-6\right \rangle$ .

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Example Question #232 : Vectors And Vector Operations

Solve:

$\left \langle 2, 5\cos^2(x), 0\right \rangle + \left \langle y, 5\sin^2(x), 2\right \rangle$

Possible Answers:

$\left \langle 2y, 25\sin^2(x)\cos^2(x), 0\right \rangle$

$\left \langle 2+y, 1, 2\right \rangle$

9+y

$\left \langle 2+y, 5, 2\right \rangle$

Correct answer:

$\left \langle 2+y, 5, 2\right \rangle$

Explanation:

To add vectors, we simply add the components. For example:

$\left \langle a, b, c\right \rangle+ \left \langle x, y, z\right \rangle= \left \langle ax+by+cz\right \rangle$

Our final answer is

$\left \langle 2+y, 5, 2\right \rangle$

Note that a Pythagorean identity was used when combining the "y" terms.

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Example Question #2231 : Calculus 3

Solve:

$\left \langle 5, 3x+5\right \rangle+\left \langle e^x, z\right \rangle$

Possible Answers:

$\left \langle 5e^x, z(3x+5)\right \rangle$

$\left \langle 5+e^x, 3x+5+z\right \rangle$

10+e^x+3x+z

$\left \langle 5+e^x, 3x+z\right \rangle$

Correct answer:

$\left \langle 5+e^x, 3x+5+z\right \rangle$

Explanation:

To add two vectors, we simply add the corresponding components (for example, $\left \langle a, b\right \rangle+ \left \langle c, d\right \rangle= \left \langle a+c, b+d\right \rangle$ )

Our answer is therefore

$\left \langle 5+e^x, 3x+5+z\right \rangle$

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Example Question #234 : Vectors And Vector Operations

Find the sum of the two vectors.

u=<1,5,7>

v=<8,1,3>

Possible Answers:

<9,6,10>

<3,6,5>

<-5, 4, 4>

<9,6,5>

Correct answer:

<9,6,10>

Explanation:

The sum of two vectors

a=<a_1, a_2, a_3>

b=<b_1, b_2, b_3>

is defined as

a+b=<a_1+b_1, a_2+b_2, a_3+b_3>

For the vectors in this problem

u+v=<1+8, 5+1, 7+3>=<9, 6, 10>

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Example Question #235 : Vectors And Vector Operations

Find the sum of the two vectors, u+v .

u=<2,3,7>

v=<4,5,2>

Possible Answers:

<6,8,9>

<4,1,3>

<5,7,12>

<-2,-2,5>

Correct answer:

<6,8,9>

Explanation:

The sum of two vectors

a=<a_1, a_2, a_3>

b=<b_1, b_2, b_3>

is defined as

a+b=<a_1+b_1, a_2+b_2, a_3+b_3>

For the vectors in this problem

u+v=<2+4, 3+5, 7+2>=<6, 8, 9>

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Example Question #236 : Vectors And Vector Operations

Find the difference between $\left \langle 30,15,100\right \rangle$ and $\left \langle 2,25,99\right \rangle$ .

Possible Answers:

$\left \langle 28,-10,1\right \rangle$

$\left \langle 32,40,199\right \rangle$

$\left \langle 29,10,3\right \rangle$

$\left \langle 15,10,1\right \rangle$

Correct answer:

$\left \langle 28,-10,1\right \rangle$

Explanation:

The formula for the difference of vectors is

$\left \langle x_1,x_2,x_3\right \rangle-\left \langle y_1,y_2,y_3\right \rangle=\left \langle x_1-y_1,x_2-y_2,x_3-y_3\right \rangle$

Using the vectors given, we get

$\left \langle 30-2,15-25,100-99\right \rangle=\left \langle 28,-10,1\right \rangle$ .

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Example Question #232 : Vectors And Vector Operations

Find the sum of the vectors $\left \langle 2,0,5\right \rangle$ and $\left \langle 1,2,3\right \rangle$ .

Possible Answers:

$\left \langle 1,7,3\right \rangle$

$\left \langle 1,9,6\right \rangle$

$\left \langle 1,1,5\right \rangle$

$\left \langle 3,2,8\right \rangle$

Correct answer:

$\left \langle 3,2,8\right \rangle$

Explanation:

The formula for adding vectors is

$a+b=\left \langle a_1+b_1,a_2+b_2,a_3+b_3\right \rangle$ .

Plugging in the values we were given, we get

$\left \langle (2+1),(0+2),(5+3)\right \rangle=\left \langle 3,2,8\right \rangle$

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Calculus 3 : Calculus 3

Study concepts, example questions & explanations for Calculus 3

All Calculus 3 Resources

Example Questions

Example Question #22 : Vector Addition

Example Question #23 : Vector Addition

Example Question #231 : Vectors And Vector Operations

Example Question #25 : Vector Addition

Example Question #232 : Vectors And Vector Operations

Example Question #2231 : Calculus 3

Example Question #234 : Vectors And Vector Operations

Example Question #235 : Vectors And Vector Operations

Example Question #236 : Vectors And Vector Operations

Example Question #232 : Vectors And Vector Operations

All Calculus 3 Resources

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