Calculus Examples

Evaluate the Integral integral of x^4e^(-x) with respect to x
Step 1
Integrate by parts using the formula , where and .
Step 2
Multiply by .
Step 3
Since is constant with respect to , move out of the integral.
Step 4
Multiply by .
Step 5
Integrate by parts using the formula , where and .
Step 6
Multiply by .
Step 7
Since is constant with respect to , move out of the integral.
Step 8
Multiply by .
Step 9
Integrate by parts using the formula , where and .
Step 10
Multiply by .
Step 11
Since is constant with respect to , move out of the integral.
Step 12
Multiply by .
Step 13
Integrate by parts using the formula , where and .
Step 14
Since is constant with respect to , move out of the integral.
Step 15
Simplify.
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Step 15.1
Multiply by .
Step 15.2
Multiply by .
Step 16
Let . Then , so . Rewrite using and .
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Step 16.1
Let . Find .
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Step 16.1.1
Differentiate .
Step 16.1.2
Since is constant with respect to , the derivative of with respect to is .
Step 16.1.3
Differentiate using the Power Rule which states that is where .
Step 16.1.4
Multiply by .
Step 16.2
Rewrite the problem using and .
Step 17
Since is constant with respect to , move out of the integral.
Step 18
The integral of with respect to is .
Step 19
Rewrite as .
Step 20
Replace all occurrences of with .