Integral of (x+5)/(x-3) dx
The solution
Detail solution
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There are multiple ways to do this integral.
Method #1
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Rewrite the integrand:
x−3x+5=1+x−38
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Integrate term-by-term:
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The integral of a constant is the constant times the variable of integration:
∫1dx=x
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The integral of a constant times a function is the constant times the integral of the function:
∫x−38dx=8∫x−31dx
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Let u=x−3.
Then let du=dx and substitute du:
∫u1du
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The integral of u1 is log(u).
Now substitute u back in:
log(x−3)
So, the result is: 8log(x−3)
The result is: x+8log(x−3)
Method #2
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Rewrite the integrand:
x−3x+5=x−3x+x−35
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Integrate term-by-term:
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Rewrite the integrand:
x−3x=1+x−33
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Integrate term-by-term:
-
The integral of a constant is the constant times the variable of integration:
∫1dx=x
-
The integral of a constant times a function is the constant times the integral of the function:
∫x−33dx=3∫x−31dx
-
Let u=x−3.
Then let du=dx and substitute du:
∫u1du
-
The integral of u1 is log(u).
Now substitute u back in:
log(x−3)
So, the result is: 3log(x−3)
The result is: x+3log(x−3)
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The integral of a constant times a function is the constant times the integral of the function:
∫x−35dx=5∫x−31dx
-
Let u=x−3.
Then let du=dx and substitute du:
∫u1du
-
The integral of u1 is log(u).
Now substitute u back in:
log(x−3)
So, the result is: 5log(x−3)
The result is: x+3log(x−3)+5log(x−3)
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Add the constant of integration:
x+8log(x−3)+constant
The answer is:
x+8log(x−3)+constant
The answer (Indefinite)
[src]
/
|
| x + 5
| ----- dx = C + x + 8*log(-3 + x)
| x - 3
|
/
∫x−3x+5dx=C+x+8log(x−3)
The graph
−8log(3)+1+8log(2)
=
−8log(3)+1+8log(2)
Use the examples entering the upper and lower limits of integration.