1*2+ 2*2^2+ 3*2^3+ 4*2^4……………………+2012*2^2012  Choose the correct choice from the following options.
A) 8100312  B) 8100313  C) 8100412  D) 8200312  E) 8300312

Rationale: take 2 outside as common we get 2 ( 1 + 2 * 1 ^ 2 + 3 * 1 ^ 3 + . . . . . . . . . 2012 * 1 ^ 2012 ) then 2 ( 1 + 2 + . . . . . 2012 ) we get 8100312 answer : a
Answer: A