Math miscellaneousHard
Question
If (4x2 + 1)n = 
ar(1 + x2)n-rx2r, then the value of ar is -
ar(1 + x2)n-rx2r, then the value of ar is -Options
A.nCr-1.4r
B.nCr3r
C.nCr4r
D.nCr-13r
Solution
Given expression can be written as
∴ ar = nCr3r
∴ ar = nCr3r
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