What is the integral of 70e^{7x} ?

The integral of 70e^{7x} is 10e^{7x}+C

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integral of 70e^{7x}

\int 70 e^{7 x} d x

10 e^{7 x} + C

Solution steps

\int 70 e^{7 x} d x

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 70 \cdot \int e^{7 x} d x

Apply u-substitution

: \int e^{u} \frac{1}{7} d u

= 70 \cdot \int e^{u} \frac{1}{7} d u

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= 70 \cdot \frac{1}{7} \cdot \int e^{u} d u

Use the common integral:

\int e^{u} d u = e^{u}

= 70 \cdot \frac{1}{7} e^{u}

Substitute back

u = 7 x

= 70 \cdot \frac{1}{7} e^{7 x}

Simplify

70 \cdot \frac{1}{7} e^{7 x} : 10 e^{7 x}

= 10 e^{7 x}

Add a constant to the solution

= 10 e^{7 x} + C

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