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if x^r occurs in the xpansion of (x+1/2)^n then the coefficient must be

if x^r occurs in the xpansion of (x+1/2)^n then the coefficient must be 
 

Grade:12

1 Answers

Harsh Patodia IIT Roorkee
askIITians Faculty 907 Points
7 years ago
Using general term for binomial expansion (a+b)n
tr+1=nCrarbn-r
a= x and b = 1/2
Required Coefficient will

nCr(1/2)n-r

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