- #1

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(x^2+4)^(-1/2)

i have tried subbing u=x^2+4 i have tried subbing u= (x^2+4)^(-1/2).

i have tried making x the subject. even tried to use partial fraction, with no avail, because i could not figure out how to use partially factorize it.

If anyone could lead me towards the right answer.

Thanks.