On what interval(s) is the function f(x)=5/x+58f(x)=5x+58 increasing?

1 Answer
Jul 29, 2017

ff is not uarr in any interval contained in RR-{0}.

Explanation:

Recall that, a function (fun.)

f" is increasing "(uarr), if f'(x) > 0.

For given fun. f," we have, "f'(x)=-5/x^2 < 0, AA x in RR-{0}.

Hence, it is not uarr in any interval contained in RR-{0}.