precalculus
posted by ck on .
find the increasing and decreasing intervals of 4x^37x+3

f = 4x^3  7x + 3
= (x1)(2x1)(2x+3)
If you've started working with derivatives yet, then you know that where f' > 0, f is increasing
f' = 12x^2  7
find where f' >0 and that will tell you where f is increasing.