Maths

Savoir si on a comprit les maths ou non suivant ma prof de maths: كان فهمت راك مافمتش وكان مافهتش راك فهمت تو فهمت علاش في براباراتواركما فمهت كما ما فمتش.
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Hi, all, espcially mathematicians. Could you please help me in finding a closed-form for the double integral below ? If there is no possible closed-form, please help me bounding the fraction with logarithms with the most accurately possible. The lower bound is preferrable to the upper bound. PS: What’s written in french means : the a parameter is positive. .
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