Find the derivative of the following function:
$f(x) = (2x+5)^2$
f'(x) = 2x+5
f'(x) = 20x
f'(x) = 8x+20
f'(x) = 10x+50
f'(x) = 10x+25
Find the interval(s) where the following function is increasing. Graph to double check your answer.
$y=\frac{1}{3}x^3+2x^2-5x-6$
Never
$(-\infty,-5)\cup (1,\infty)$
Always
(-5,1)
