2 / | | (1/2 + x*log(x)) dx | / 1
Integral(1/2 + x*log(x), (x, 1, 2))
Integrate term-by-term:
There are multiple ways to do this integral.
Let .
Then let and substitute :
Use integration by parts:
Let and let .
Then .
To find :
Let .
Then let and substitute :
The integral of a constant times a function is the constant times the integral of the function:
The integral of the exponential function is itself.
So, the result is:
Now substitute back in:
Now evaluate the sub-integral.
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 a constant times a function is the constant times the integral of the function:
The integral of the exponential function is itself.
So, the result is:
Now substitute back in:
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.
The integral of a constant times a function is the constant times the integral of the function:
The integral of is when :
So, the result is:
The integral of a constant is the constant times the variable of integration:
The result is:
Now simplify:
Add the constant of integration:
The answer is:
/ 2 2 | x x x *log(x) | (1/2 + x*log(x)) dx = C + - - -- + --------- | 2 4 2 /
-1/4 + 2*log(2)
=
-1/4 + 2*log(2)
-1/4 + 2*log(2)
Use the examples entering the upper and lower limits of integration.