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If we try to find sum of series 1(2),2(2*2),3(2*2*2),4(2*2*2*2);the addition is 98.but if we use formulae as sum of n*(2)^n or we integrate above sum by converting sum into integral we get different ans.why?what is farmulae for above series?

If we try to find sum of series 1(2),2(2*2),3(2*2*2),4(2*2*2*2);the addition is 98.but if we use formulae as sum of n*(2)^n or we integrate above sum by converting  sum into integral we get different ans.why?what is farmulae for above series?

Grade:12th pass

1 Answers

Deepak Kumar Shringi
askIITians Faculty 4404 Points
6 years ago
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