   Chapter 6.1, Problem 4CP ### Calculus: An Applied Approach (Min...

10th Edition
Ron Larson
ISBN: 9781305860919

#### Solutions

Chapter
Section ### Calculus: An Applied Approach (Min...

10th Edition
Ron Larson
ISBN: 9781305860919
Textbook Problem
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# Checkpoint 4Find ∫ x 3 e x   d x

To determine

To calculate: The value of indefinite integral x3exdx.

Explanation

Given Information:

The provided indefinite integral is x3exdx.

Formula used:

The integration by parts udv=uvvdu.

Where, u and v are function of x.

eaxdx=eaxa+C

Calculation:

Consider the indefinite integral x3exdx

Here,

dv=exdx and u=x3

First find v,

dv=exdxdv=exdx

On further solving,

v=ex …… (1)

Now find du,

u=x3

Differentiate both side with respect x,

dudx=d(x3)dxdudx=3x2

And,

du=3x2dx …… (2)

Apply integration by parts formula and substitute equation (1) and (2) in udv=uvvdu,

x3exdx=x3ex3x2exdx

Use integration by parts on the second integral x2exdx

Here,

dv=exdx and u=x2

First find v,

dv=exdxdv=exdx

On further solving,

v=ex …… (3)

Now find du,

u=x2

Differentiate both side with respect x,

dudx=d(x2)dxdudx=2x

And,

du=2xdx …… (4)

Apply integration by parts formula and substitute equation (3) and (4) in udv=uvvdu,

x2exdx=x2ex2xexdx

Here,

dv=exdx and u=x

First find v,

dv=exdxdv=exdx

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