Hello,

You're not asked that... Your series is right.

Rightso on part B i got a sum of s(1) = e/(e+1) is it right?

Only if (else, the series diverges), so it's for x>0 (this is part D).on part C i got S(x) = e^x/(e^x+1) right?

Actually, the exact value of s(x) is : (simplify it the way you want)

You can use the alternate series testsince i am not sure about my answers i don't know part D, for what values it converges.