Question

The sum of the series 1 x 2^0 +2 x 2^1+3 2^2 +4 × 2^3 +5 2^4+ ..... +100 x 2^99 is
(1) 99 x 2100
(2)99 x 2100 + 1
(3) 100 x 2100
(4) 100 x 2100 + 1​

Answer 1

3

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