Find f'(x).f(x) = 9ex - 2x4

A. 9xex-1 - 8x4
B. 9ex - 4x3
C. 9ex - 8x4
D. 9ex - 8x3


Answer: D

Mathematics

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A solution of 0.5 N acid is known to be 95% ionized. Find [H+], the hydrogen ion concentration.

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Solve the equation.x -  = -6

A. {31} B. {-29} C. {29} D. {-31}

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