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(x+5)/(x-3)

Integral of (x+5)/(x-3) dx

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The solution

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  1         
  /         
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 |  x + 5   
 |  ----- dx
 |  x - 3   
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01x+5x3dx\int\limits_{0}^{1} \frac{x + 5}{x - 3}\, dx
Integral((x + 5)/(x - 3), (x, 0, 1))
Detail solution
  1. There are multiple ways to do this integral.

    Method #1

    1. Rewrite the integrand:

      x+5x3=1+8x3\frac{x + 5}{x - 3} = 1 + \frac{8}{x - 3}

    2. Integrate term-by-term:

      1. The integral of a constant is the constant times the variable of integration:

        1dx=x\int 1\, dx = x

      1. The integral of a constant times a function is the constant times the integral of the function:

        8x3dx=81x3dx\int \frac{8}{x - 3}\, dx = 8 \int \frac{1}{x - 3}\, dx

        1. Let u=x3u = x - 3.

          Then let du=dxdu = dx and substitute dudu:

          1udu\int \frac{1}{u}\, du

          1. The integral of 1u\frac{1}{u} is log(u)\log{\left(u \right)}.

          Now substitute uu back in:

          log(x3)\log{\left(x - 3 \right)}

        So, the result is: 8log(x3)8 \log{\left(x - 3 \right)}

      The result is: x+8log(x3)x + 8 \log{\left(x - 3 \right)}

    Method #2

    1. Rewrite the integrand:

      x+5x3=xx3+5x3\frac{x + 5}{x - 3} = \frac{x}{x - 3} + \frac{5}{x - 3}

    2. Integrate term-by-term:

      1. Rewrite the integrand:

        xx3=1+3x3\frac{x}{x - 3} = 1 + \frac{3}{x - 3}

      2. Integrate term-by-term:

        1. The integral of a constant is the constant times the variable of integration:

          1dx=x\int 1\, dx = x

        1. The integral of a constant times a function is the constant times the integral of the function:

          3x3dx=31x3dx\int \frac{3}{x - 3}\, dx = 3 \int \frac{1}{x - 3}\, dx

          1. Let u=x3u = x - 3.

            Then let du=dxdu = dx and substitute dudu:

            1udu\int \frac{1}{u}\, du

            1. The integral of 1u\frac{1}{u} is log(u)\log{\left(u \right)}.

            Now substitute uu back in:

            log(x3)\log{\left(x - 3 \right)}

          So, the result is: 3log(x3)3 \log{\left(x - 3 \right)}

        The result is: x+3log(x3)x + 3 \log{\left(x - 3 \right)}

      1. The integral of a constant times a function is the constant times the integral of the function:

        5x3dx=51x3dx\int \frac{5}{x - 3}\, dx = 5 \int \frac{1}{x - 3}\, dx

        1. Let u=x3u = x - 3.

          Then let du=dxdu = dx and substitute dudu:

          1udu\int \frac{1}{u}\, du

          1. The integral of 1u\frac{1}{u} is log(u)\log{\left(u \right)}.

          Now substitute uu back in:

          log(x3)\log{\left(x - 3 \right)}

        So, the result is: 5log(x3)5 \log{\left(x - 3 \right)}

      The result is: x+3log(x3)+5log(x3)x + 3 \log{\left(x - 3 \right)} + 5 \log{\left(x - 3 \right)}

  2. Add the constant of integration:

    x+8log(x3)+constantx + 8 \log{\left(x - 3 \right)}+ \mathrm{constant}


The answer is:

x+8log(x3)+constantx + 8 \log{\left(x - 3 \right)}+ \mathrm{constant}

The answer (Indefinite) [src]
  /                                
 |                                 
 | x + 5                           
 | ----- dx = C + x + 8*log(-3 + x)
 | x - 3                           
 |                                 
/                                  
x+5x3dx=C+x+8log(x3)\int \frac{x + 5}{x - 3}\, dx = C + x + 8 \log{\left(x - 3 \right)}
The graph
0.001.000.100.200.300.400.500.600.700.800.90-4-1
The answer [src]
1 - 8*log(3) + 8*log(2)
8log(3)+1+8log(2)- 8 \log{\left(3 \right)} + 1 + 8 \log{\left(2 \right)}
=
=
1 - 8*log(3) + 8*log(2)
8log(3)+1+8log(2)- 8 \log{\left(3 \right)} + 1 + 8 \log{\left(2 \right)}
1 - 8*log(3) + 8*log(2)
Numerical answer [src]
-2.24372086486532
-2.24372086486532
The graph
Integral of (x+5)/(x-3) dx

    Use the examples entering the upper and lower limits of integration.