OpenStudy (anonymous):

Find the derivative of f(x) = 5x + 9 at x = 2.

5 years ago
OpenStudy (anonymous):

If x=2 then$f(2)=7+9=16$The derivative of a constant is zero so,$f'(2)=0$

5 years ago
OpenStudy (anonymous):

I meant: $f(2)=10+9=19$$f'(2)=0$

5 years ago
OpenStudy (phoenixfire):

Would you not find the derivative and then pass in 2 as x. $f(x)=5x+9$ $f \prime (x) = 5$ Therefore, $f \prime (2) = 5$

5 years ago