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Raghu Surat SVNIT Grade: Upto college level
        

Q. .    If x1,x2, ………….xn are 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……………………. xare in


(a)   A.P.


(b)    G.P.


(c)    H.P.


(d)    none of these

6 years ago

Answers : (1)

aman bansal
askIITians Faculty
33 Points
										

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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AMAN BANSAL

6 years ago
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