Find the root. Assume that variables represent any real number.

A. -7
B. -7x
C. -7x3
D. -49x

Answer: B

Mathematics

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Given y = f(u) and u = g(x), find dy/dx = f'(g(x))g'(x).y = csc u, u = x6 + 8x

A. -(6x5 + 8) csc x cot x B. -(6x5 + 8) csc (x6 + 8x) cot (x6 + 8x) C. - csc (x6 + 8x) cot (x6 + 8x) D. -(6x5 + 8) cot2(x6 + 8x)

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Mathematics

Find the absolute value.

A. 0 B. -21 C. ± 21 D. 21

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Mathematics

Solve. -  = 

A.
B.
C. - 
D. - 

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Mathematics

Find the domain.f(x) = 

A. {x|x ? 13} or [13, ?) B. {x|x ? 13} or (-?, 13] C. All real numbers or (-?, ?) D. {x|x ? -13} or (-?, -13]

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Mathematics