# Math2

posted by
**Ralph**
.

Given f, a derivable function and

y = f (x)^3 + 40√(f(x)+12) .

Knowing that f(4) = -4

and that dy/dx|x=4 = 14 ,

calculate f’(4)

posted by
**Ralph**
.

Given f, a derivable function and

y = f (x)^3 + 40√(f(x)+12) .

Knowing that f(4) = -4

and that dy/dx|x=4 = 14 ,

calculate f’(4)