Q.. If x1,x2, ………….xnare n non-zero real numbers such that(x12+x22+ …..+x(n-1)2)(x22+x32+ …..+xn2) ≤ (x1,x2+ x2,x3+…….+ xn-1,xn)2,then x1,x2…………………….xnare in(a) A.P.(b) G.P.(c) H.P.(d) none of these

dear raghu,

the above question can be solved by expanding the terms and then converting it into a perfect square

for simplicity  we can take n=3 and then conclude that it forms GP

hence answer is (B)

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