Question:
Mark (√) against the correct answer in the following:
The range of $f(x)=a^{x}$, where $a>0$ is
A. $[-\infty, 0]$
B. $[-\infty, 0)$
C. $[0, \infty)$
D. $(0, \infty)$
Solution:
$f(x)=a^{x}$
when $x<0$
$0 When $x \geq 0$ $a^{x}>0$ Therefore range of $f(x)=a^{x}=(0, \infty)$