Question

need help with a calculus problem :/

Compute f '(a) algebraically for the given value of a:
f(x) = x3 + 2x; a = 9

Answer 1

Do you mean using the limit definition?

Answer 2

its x^3

Answer 3

f'(x) = 3x^2 + 2. Plug in 9.
3(9)^2 + 2 = 245

Answer 4

f'(x) = 3x^2 + 2
f'(9) = 3(9)^2 + 2
f'(9) = 245

Answer 5

thats what i got thanks guys