MBA Exam

http://postimage.org/image/40uy6x9zp/full/Please explain the method,..... in detail

1) A
2) B
3) C
4) D
5) E

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MBA Other Question
What is the sum of the series 1!+2!+3!+4!+....+49!+50! ??

what is the sum of coefficients in the expansion (3+2x)^99plz give approach

1) 5^99
2) 3^99
3) 2^99
4) 6^99