What is the integral of (e^x)/(e^x+3) ?

The integral of (e^x)/(e^x+3) is ln|e^x+3|+C

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integral of (e^x)/(e^x+3)

\int \frac{e ^{x}}{e ^{x} + 3} d x

ln ∣ e^{x} + 3 ∣ + C

Solution steps

\int \frac{e ^{x}}{e ^{x} + 3} d x

Apply u-substitution

: \int \frac{1}{u} d u

= \int \frac{1}{u} d u

Use the common integral:

\int \frac{1}{u} d u = ln (∣ u ∣)

= ln ∣ u ∣

Substitute back

u = e^{x} + 3

= ln ∣ e^{x} + 3 ∣

Add a constant to the solution

= ln ∣ e^{x} + 3 ∣ + C

\int sin (3 x) sin (4 x) d x

\int (x^{3} + 3)^{\frac{1}{4}} x^{5} d x

\int 3 (x + 5) e^{4 x} d x

\frac{d}{d x} ((lo g_{10} (x))^{2})

What is the integral of (e^x)/(e^x+3) ?
The integral of (e^x)/(e^x+3) is ln|e^x+3|+C