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Answer added by  Abdullrhman elhelw
1 year ago

result will be a series, so if you limit the final value of the series to 20, then the series will be like that. 20  Σ 2*n     n=1      

 

Answer added by  Saeed Bakhsh, Consultant PM & IT Expert - National Meteorology Center, National Meteorology Center - Contractors
1 year ago

the sum of the series 1+2+4+8+16+....+2^n is 2^n - 1