What are the possible values for f'(x) if f'(x) exists and for f(x1) > f(x2) every x1>x2?
a) f'(x) < 0
b) f'(x) >0
c) f'(x) = 0
d) f'(x) ≥ 0
Sorry, these really confused me :|
If x1 > x2 AND f(x1) > f(x2) this describes a function with a POSITIVE slope ( f' (x) )
So f'(x) > 0
If x1 > x2 AND f(x1) > f(x2) this describes a function with a POSITIVE slope ( f' (x) )
So f'(x) > 0