Q.
The coefficient of 6th term in the expansion of (1+x)8
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a
54
b
56
c
58
d
62
answer is B.
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Detailed Solution
n = 8Tr+1=Cr 8xrAccording to problem coefficient of 6th term T6=T5+1=C5 8x5∵ Coefficient of 6th term is 8C5=56
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