What is the integral of 7^{2x}e^x ?

The integral of 7^{2x}e^x is ((49e)^x)/(ln(49e))+C

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integral of 7^{2x}e^x

\int 7^{2 x} e^{x} d x

\frac{( 49 e ) ^{x}}{ln ( 49 e )} + C

Solution steps

\int 7^{2 x} e^{x} d x

7^{2 x} = 4 9^{x}

= \int 4 9^{x} e^{x} d x

Apply exponent rule:

a^{n} \cdot b^{n} = (a \cdot b)^{n}

4 9^{x} e^{x} = (49 e)^{x}

= \int (49 e)^{x} d x

\int a^{x} d x = \frac{a ^{x}}{ln a}

= \frac{( 49 e ) ^{x}}{ln ( 49 e )}

Add a constant to the solution

= \frac{( 49 e ) ^{x}}{ln ( 49 e )} + C

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What is the integral of 7^{2x}e^x ?
The integral of 7^{2x}e^x is ((49e)^x)/(ln(49e))+C