4 x 3 x ? d x equals:

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Solution

Q.
$\int 4^{x} 3^{x} d x$ equals:

1 $\frac{12^{x}}{\log 12} + C$

2 $\frac{4^{x}}{\log 4} + C$

3 $(\frac{4^{x} \cdot 3^{x}}{\log 4 \cdot \log 3}) + C$

4 $\frac{3^{x}}{\log 3} + C$

Ans.
(1)

Ans. $\frac{12^{x}}{\log 12} + C$

Explanation:

Let $I = \int 4^{x} 3^{x} d x$

$\Rightarrow$ $I = \int 12^{x} d x$

$\Rightarrow$ $I = \frac{12^{x}}{\log 12} + C$

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