1 / | | / 2\ | x*log\1 + x / dx | / -1
Integral(x*log(1 + x^2), (x, -1, 1))
There are multiple ways to do this integral.
Let .
Then let and substitute :
The integral of a constant times a function is the constant times the integral of the function:
Use integration by parts:
Let and let .
Then .
To find :
The integral of the exponential function is itself.
Now evaluate the sub-integral.
The integral of the exponential function is itself.
So, the result is:
Now substitute back in:
Use integration by parts:
Let and let .
Then .
To find :
The integral of is when :
Now evaluate the sub-integral.
Let .
Then let and substitute :
Rewrite the integrand:
Integrate term-by-term:
The integral of a constant is the constant times the variable of integration:
The integral of a constant times a function is the constant times the integral of the function:
Let .
Then let and substitute :
The integral of is .
Now substitute back in:
So, the result is:
The result is:
Now substitute back in:
Add the constant of integration:
The answer is:
/ | 2 / 2\ / 2\ | / 2\ 1 x \1 + x /*log\1 + x / | x*log\1 + x / dx = - - + C - -- + -------------------- | 2 2 2 /
Use the examples entering the upper and lower limits of integration.