Solve-S-n-1-2-2-3-2-2-4-2-3-n-2-n-1-

Question Number 134839 by SOMEDAVONG last updated on 07/Mar/21

Solve, S_{n} = 1 + 2 \times 2 + 3 \times 2^{2} + 4 \times 2^{3} + \dots + n \times 2^{n - 1} .

Commented by mr W last updated on 07/Mar/21

s e e Q 134200

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