1.

If \[{{(1+ax)}^{n}}=1+8x+24{{x}^{2}}+....,\]then the value of a and n is [IIT 1983; Pb. CET 1994, 99]

A. 2, 4
B. 2, 3
C. 3, 6
D. 1, 2
Answer» B. 2, 3


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