I am integrating by parts. I do not know what let u and v be. I am also stuck on the radical. e^{sqre rt} 3s+9 ds I want to let u = 3s+9 and v = e^rt x can it be done or am i just lost?
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now do parts ... let and
Why did you solve for ds?
because one cannot integrate a function of t w/respect to s.
Thanks skeeter.
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