a tutor here direct me to a page but i do not know how to use it i tried but it did not show me any step...i need help plz
OK. First step is a trig substitution. x = √2 sec(u) x^2-2 = 2tan^2(u) dx = √2 sec(u) tan(u) du now the integral is sec(u)/(√2 sec(u)-1) du see what you can do with that.
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