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Question
The sum of coefficients of the last six terms in the expansion of (1+x)11 is
Options:
A .  256
B .  512
C .  1024
D .  2048
Answer: Option C
:
C
The coefficients of the last six terms of (1+x)11 are
11C0,11C1,11C2....11C5
Sum=11C0+11C1+11C2+11C3+11C4+11C5=1+11+55+165+330+462=1024

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