Write the domain of the rational function in interval notation.f(x) = 

A. (-?, -2) ? (-2, 0) ? (0, 2) ? (2, ?)
B. (-?, -3) ? (-3, ?)
C. (-?, 0) ? (0, -4) ? (-4, ?)
D. (-?, -2) ? (-2, 2) ? (2, ?)


Answer: C

Mathematics

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Evaluate the integral by using a substitution prior to integration by parts.

A. x cos (ln x) + sin (ln x)+ C
B. [cos (ln x) + sin (ln x)] + C
C. x[cos (ln x) + sin (ln x)] + C
D. [cos (ln x) - sin (ln x)] + C

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Determine whether the pair of fractions is equivalent.  and  

A. equivalent B. not equivalent

Mathematics

Use a sum or difference identity to find the exact value.

A. - 
B. - 
C. -2
D. - 

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Simplify the expression. Assume that variables represent nonzero numbers.(4a)2

A. 16a B. 16a2 C. 8a2 D. 8a

Mathematics