Question Number 35613 by abdo mathsup 649 cc last updated on 21/May/18
$${find}\:\:{I}_{{a},{b}} =\:\int_{−\infty} ^{+\infty} \:\:\:\:\:\:\frac{{e}^{{x}} }{\left(\mathrm{1}+{a}\:{e}^{{x}} \right)\left(\mathrm{1}+{be}^{{x}} \right)}{dx}\:.. \\ $$
find-I-a-b-e-x-1-a-e-x-1-be-x-dx-