Hello Guys dont know if this is the right forum for this questio, but i do really need your help on them
integrate:
a) by substitution :
integral(4 x/sqrt(8 x^2-1), x, 1, 2)
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Hello Guys dont know if this is the right forum for this questio, but i do really need your help on them
integrate:
a) by substitution :
integral(4 x/sqrt(8 x^2-1), x, 1, 2)
let $\displaystyle u=8x^2-1 \implies du=16xdx \iff \frac{du}{16}=dx$Quote:
Originally Posted by taichi2910
$\displaystyle
\int_{1}^{2}\frac{4x}{8x^2-1}dx=\frac{1}{4}\int_{7}^{31}\frac{1}{u}du
$
You should be able to finish from here.
