next let let to get let then:
both are easy to find. we'll eventually get:
now let put to get by (1).
changing the order of integration will give us and therefore by (2):
the final answer makes sense to me. so i can claim that i have survived from all the annoying algebra involved in there. (Nod)
Do you have any integrals which involve just a little algebra but our deep thinking ,
In fact , I cannot survive from the annoying annoying algebra !!