the function f, defined for x is an element of R, x>0, is such that
F'(x)=x^2 - 2 + 1/x^2
a) Find the value of f''(x) at x=4
b) Given that f(3) = 0, find f(x)
c) Prove that f is an increasing function
my problem is part c i can do the first two, this is from Mixed exercise 9D Q3 in the c2 text book