Question

If a1, a2, a3, a4 are the coefficients of four consecutive terms in the expansion of (1+x)^n, then $\frac{a_{1} }{a_{1}+a_{2} } , \frac{a_{2} }{a_{2}+ a_{3} } , \frac{a_{3} }{a_{3}+a_{4} }$ are in:-
A) AP
B) GP
C) AGP
D) HP

Answer 1

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