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Find the average value have of the function h on the given interval. h(u) = (ln(u))/u, [1, 5]

Sagot :

The average value have of the function h on the given interval is  [tex]\frac{1}{2} \ln^2 (2)[/tex].

How to find the Average Value of function ?

The given function is [tex]h (u) = \frac{\ln (u)}{u}[/tex] on the interval (1, 5).

The average value of function (a, b) is found by using the formula:

[tex]\frac{1}{(b -a)} \displaystyle \int^{b}_{a} f(x) dx[/tex]

Here the function is  [tex]h (u) = \frac{\ln (u)}{u}[/tex] and a = 1, b = 5

Now,

[tex]\dfrac{1}{(5 - 1)} \displaystyle \int^{5}_{1} \frac{\ln (u)}{u}\ du[/tex]

[tex]= \dfrac{1}{4} \displaystyle \int^{5}_{1} \frac{\ln (u)}{u}\ du[/tex]

Substitute [tex]\ln (u) = t, dt = \frac{1}{u}\ du[/tex]

[tex]\dfrac{1}{4} \displaystyle \int^{4}_{1} \frac{\ln (u)}{u} du = \frac{1}{4} \int^{4}_{1} t (dt)[/tex]

                      [tex]= \frac{1}{4} \left [\frac{t^2}{2} \right ]^{4}_{1}[/tex]

                      [tex]= \frac{1}{8} \left [\{\ln (u)\}^2 \right ]^{4}_{1}[/tex]

                      [tex]= \frac{1}{8} [\{\ln (4) \}^2 - \{\ln (1) \}^2 ][/tex]

                      [tex]= \frac{1}{8} [\{\ln (4)\}^2 - 0][/tex]

                      [tex]= \frac{1}{8} \ln^2 (4)[/tex]

                      [tex]= \frac{2}{4} [2 \ln (2)]^2[/tex]

                      [tex]= \frac{1}{2} \ln^2 (2)[/tex]

Thus from the above conclusion we can say that The average value have of the function h on the given interval is  [tex]\frac{1}{2} \ln^2 (2)[/tex].

Learn more about the Integrational Average value please click here : https://brainly.com/question/27419605

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