PROBLEM
Evaluate. Assume u>0 when ln4 appears
∫x11ex12dx
STEP 1
1. We are given the integral ∫x11ex12dx.
2. We assume u>0 when ln4 appears, although ln4 does not directly appear in this problem.
3. We will use substitution to solve the integral.
STEP 2
1. Identify a substitution to simplify the integral.
2. Apply the substitution to the integral.
3. Simplify the integral in terms of the new variable.
4. Integrate with respect to the new variable.
5. Substitute back to the original variable.
STEP 3
Identify a substitution. Let:
u=x12 Then, differentiate u with respect to x:
dxdu=12x11
STEP 4
Solve for dx in terms of du and x:
du=12x11dx dx=12x111du
STEP 5
Substitute u=x12 and dx=12x111du into the integral:
∫x11ex12dx=∫x11eu⋅12x111du Simplify the expression:
=121∫eudu
STEP 6
Integrate with respect to u:
121∫eudu=121eu+C where C is the constant of integration.
SOLUTION
Substitute back u=x12 into the integrated result:
121eu+C=121ex12+C The evaluated integral is:
121ex12+C
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