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xln^2x

Integral of xln^2x dx

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The solution

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01xlog(x)2dx\int\limits_{0}^{1} x \log{\left(x \right)}^{2}\, dx
Integral(x*log(x)^2, (x, 0, 1))
Detail solution
  1. Let u=log(x)u = \log{\left(x \right)}.

    Then let du=dxxdu = \frac{dx}{x} and substitute dudu:

    u2e2udu\int u^{2} e^{2 u}\, du

    1. Use integration by parts:

      udv=uvvdu\int \operatorname{u} \operatorname{dv} = \operatorname{u}\operatorname{v} - \int \operatorname{v} \operatorname{du}

      Let u(u)=u2u{\left(u \right)} = u^{2} and let dv(u)=e2u\operatorname{dv}{\left(u \right)} = e^{2 u}.

      Then du(u)=2u\operatorname{du}{\left(u \right)} = 2 u.

      To find v(u)v{\left(u \right)}:

      1. Let u=2uu = 2 u.

        Then let du=2dudu = 2 du and substitute du2\frac{du}{2}:

        eu2du\int \frac{e^{u}}{2}\, du

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

          False\text{False}

          1. The integral of the exponential function is itself.

            eudu=eu\int e^{u}\, du = e^{u}

          So, the result is: eu2\frac{e^{u}}{2}

        Now substitute uu back in:

        e2u2\frac{e^{2 u}}{2}

      Now evaluate the sub-integral.

    2. Use integration by parts:

      udv=uvvdu\int \operatorname{u} \operatorname{dv} = \operatorname{u}\operatorname{v} - \int \operatorname{v} \operatorname{du}

      Let u(u)=uu{\left(u \right)} = u and let dv(u)=e2u\operatorname{dv}{\left(u \right)} = e^{2 u}.

      Then du(u)=1\operatorname{du}{\left(u \right)} = 1.

      To find v(u)v{\left(u \right)}:

      1. Let u=2uu = 2 u.

        Then let du=2dudu = 2 du and substitute du2\frac{du}{2}:

        eu2du\int \frac{e^{u}}{2}\, du

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

          False\text{False}

          1. The integral of the exponential function is itself.

            eudu=eu\int e^{u}\, du = e^{u}

          So, the result is: eu2\frac{e^{u}}{2}

        Now substitute uu back in:

        e2u2\frac{e^{2 u}}{2}

      Now evaluate the sub-integral.

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

      e2u2du=e2udu2\int \frac{e^{2 u}}{2}\, du = \frac{\int e^{2 u}\, du}{2}

      1. Let u=2uu = 2 u.

        Then let du=2dudu = 2 du and substitute du2\frac{du}{2}:

        eu2du\int \frac{e^{u}}{2}\, du

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

          False\text{False}

          1. The integral of the exponential function is itself.

            eudu=eu\int e^{u}\, du = e^{u}

          So, the result is: eu2\frac{e^{u}}{2}

        Now substitute uu back in:

        e2u2\frac{e^{2 u}}{2}

      So, the result is: e2u4\frac{e^{2 u}}{4}

    Now substitute uu back in:

    x2log(x)22x2log(x)2+x24\frac{x^{2} \log{\left(x \right)}^{2}}{2} - \frac{x^{2} \log{\left(x \right)}}{2} + \frac{x^{2}}{4}

  2. Now simplify:

    x2(2log(x)22log(x)+1)4\frac{x^{2} \left(2 \log{\left(x \right)}^{2} - 2 \log{\left(x \right)} + 1\right)}{4}

  3. Add the constant of integration:

    x2(2log(x)22log(x)+1)4+constant\frac{x^{2} \left(2 \log{\left(x \right)}^{2} - 2 \log{\left(x \right)} + 1\right)}{4}+ \mathrm{constant}


The answer is:

x2(2log(x)22log(x)+1)4+constant\frac{x^{2} \left(2 \log{\left(x \right)}^{2} - 2 \log{\left(x \right)} + 1\right)}{4}+ \mathrm{constant}

The answer (Indefinite) [src]
  /                                              
 |                     2    2    2       2       
 |      2             x    x *log (x)   x *log(x)
 | x*log (x) dx = C + -- + ---------- - ---------
 |                    4        2            2    
/                                                
xlog(x)2dx=C+x2log(x)22x2log(x)2+x24\int x \log{\left(x \right)}^{2}\, dx = C + \frac{x^{2} \log{\left(x \right)}^{2}}{2} - \frac{x^{2} \log{\left(x \right)}}{2} + \frac{x^{2}}{4}
The graph
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The answer [src]
1/4
14\frac{1}{4}
=
=
1/4
14\frac{1}{4}
1/4
Numerical answer [src]
0.25
0.25
The graph
Integral of xln^2x dx

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