# Is the function #f(x) = (18)^x# increasing or decreasing?

##### 2 Answers

Oct 28, 2015

depend on the value of

#### Explanation:

if

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Oct 30, 2015

The function is increasing.

#### Explanation:

An exponential function

- increasing for
#a>1# - decreasing for
#a in (0;1)# - not defined for
#a<0# (because negative numbers cannot be raised to rational powers#(-1)^(1/2)=sqrt(-1)# is not a real number)