
Parviz F. answered 11/05/13
Tutor
4.8
(4)
Mathematics professor at Community Colleges
So n=4
S =[ 4 ( 4*4 + 1)] /2 = 4 ( 17) /2 = 34.
Pj P.
asked 11/04/13Parviz F. answered 11/05/13
Mathematics professor at Community Colleges
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Pj P.
11/05/13