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Which of the following expressions are equivalent to $-\dfrac{8}{11}-\dfrac{3}{4}-\dfrac{1}{4}$ ?

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Precalculus

Evaluate rational exponents

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Let

x^{2}-y^{2}=28

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What is the value of

\frac{d^{2} y}{d x^{2}}

at the point

(8,-6)

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Give an exact number.

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Posted 9 months ago

Question

Let

f(x)=2 \cos \left(\frac{x}{2}\right)

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Find

f^{\prime \prime}(x)

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1

answer:

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(A)

-\cos \left(\frac{x}{2}\right)

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(B)

-\sin \left(\frac{x}{2}\right)

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(C)

-8 \cos \left(\frac{x}{2}\right)

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(D)

-\frac{1}{2} \cos \left(\frac{x}{2}\right)

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Posted 9 months ago

Question

Last week, the thickness of the ice on a lake increased by

\frac{25}{t+3}

centimeters per day (where

t

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By how many centimeters did the thickness of the ice increase between

t=0

and

t=4

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1

answer:

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(A)

\frac{1,000}{441}

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(B)

\frac{100}{21}

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(C)

25 \ln \left(\frac{7}{3}\right)

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(D)

25 \ln (4)

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Posted 9 months ago

Question

What is the area of the region bound by the graphs of

f(x)=-x^{2}, g(x)=3 x-10

, and

x=0

in quadrant IV?

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1

answer:

\newline

2

\newline

\frac{8}{3}

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(C)

\frac{16}{3}

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(D)

\frac{34}{3}

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Question

Let

f

be a twice differentiable function, and let

f(1)=-7

f^{\prime}(1)=0

, and

f^{\prime \prime}(1)=-2

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What occurs in the graph of

f

at the point

(1,-7)

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1

answer:

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(A)

(1,-7)

is a minimum point.

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(B)

(1,-7)

is a maximum point.

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Posted 9 months ago

Question

Let

f

be a twice differentiable function, and let

f(-3)=-4

f^{\prime}(-3)=0

, and

f^{\prime \prime}(-3)=1

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What occurs in the graph of

f

at the point

(-3,-4)

\newline

Choose

1

answer:

\newline

(A)

(-3,-4)

is a minimum point.

\newline

(B)

(-3,-4)

is a maximum point.

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Posted 9 months ago

Question

What is the area of the region between the graphs of

f(x)=x^{2}-4 x+1

and

g(x)=3 x-5

from

x=1

x=4

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Choose

1

answer:

\newline

(A)

\frac{125}{6}

\newline

(B)

\frac{27}{2}

\newline

(C)

4

\newline

(D)

\frac{81}{2}

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Posted 9 months ago

Question

What is the area of the region between the graphs of

f(x)=x^{2}-3 x

and

g(x)=2 x

from

x=0

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1

answer:

\newline

(A)

\frac{175}{6}

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(B)

25

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(C)

\frac{325}{6}

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(D)

\frac{125}{6}

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What is the area of the region bound by the graphs of

f(x)=\sqrt{x-2}, g(x)=14-x

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(A)

\frac{99}{2}

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(B)

\frac{19}{6}

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(C)

\frac{151}{2}

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(D)

\frac{45}{2}

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Question

\frac{d}{d x}\left[\frac{x^{3}}{\sin (x)}\right]=

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View all (9)

Which of the following expressions are equivalent to −811−34−14-\dfrac{8}{11}-\dfrac{3}{4}-\dfrac{1}{4}−118​−43​−41​?

Which of the following expressions are equivalent to $-\dfrac{8}{11}-\dfrac{3}{4}-\dfrac{1}{4}$ ?