Simplify the expression. Assume that all variables are positive when they appear.

A. x 
B.
C. 16x
D.

Answer: D

Mathematics

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Evaluate the integral.

A. sin-1 + C
B. (2x + 2) ln  + C
C. tan-1 + C
D. 3 tan-1 + C

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Mathematics

Calculate the derivative of the function. Then find the value of the derivative as specified.f(x) = x2 + 7x - 2; f '(0)

A. f '(x) = x + 7; f '(0) = 7 B. f '(x) = 2x + 7; f '(0) = 7   C. f '(x) = 2x - 2; f '(0) = - 2 D. f '(x) = 2x; f '(0) = 0

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Mathematics

Simplify.

A. -(x + 4) B. -(x - 4) C. 4x(x + 4) D. x + 4

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Mathematics

Divide and express the result in standard form.

A. 4 - 2i
B.  + i
C.  - i
D. 4 + 2i

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Mathematics