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Mark the correct alternative in the following:

Question:

Mark the correct alternative in the following:

Function $f(x)=a^{x}$ is increasing or $R$, if

A. $a>0$

B. $a<0$

C. $a>1$

D. $a>0$

Solution:

Let $\mathrm{x}_{1}<\mathrm{x}_{2}$ and both are real number

$a^{x_{1}}

$\Rightarrow f\left(x_{1}\right)

$\Rightarrow x_{1}

only possible on $a>1$

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