Find f' (x) for f (x) = - 8x^2 - 5x - 4.

A.) - 16x - 5

B.) - 16x - 4

C.) 16x + 5

D.) None of these

Question

Derrick Boyle

Mathematics

14 January, 22:30

Find f' (x) for f (x) = - 8x^2 - 5x - 4.

A.) - 16x - 5

B.) - 16x - 4

C.) 16x + 5

D.) None of these

+4

Answers (1)

Know the Answer?

Anabel Thompson · Answer 1

D/dx of - 8x^2 - 5x - 4

So, use the power rule: - 8 * d/dx (x^2) this means (x^n) ' = n * x^n-1

So - 8*2x

-5 * d/dx (x) = - 5 * 1

So - 5

d/dx of 4 is 0, because 4 is a costant.

Final result

-16x - 5

Find f' (x) for f (x) = - 8x^2 - 5x - 4.A.) - 16x - 5B.) - 16x - 4C.) 16x + 5D.) None of these

Find f' (x) for f (x) = - 8x^2 - 5x - 4.

A.) - 16x - 5

B.) - 16x - 4

C.) 16x + 5

D.) None of these