calculate the first 30 partial sums for:

Question

A)1- 1/2 + 1/3 - 1/4 + 1/5 -...
B) 1 + 1/3 - 1/2 + 1/5 + 1/7 - 1/4 + 1/9 +1/11 - 1/6 +...
C)1 + 1/3 + 1/5 - 1/2 + 1/7 + 1/9 + 1/11 - 1/4 +...

Then estimate what A and B converge to and estimate the error.