1.

Consider three distinct real numbers a,b,c in a G.P with a^2+b^2+c^2=t^2 and a+b+c =alpha t .The sum of the common ratio and its reciprocal is denoted by S. Complete set of alpha^2 is

Answer»

`(-2,2)`
`(-oo,-2) cup (2,oo)`
`(-1,1)`
`(-oo, -1)cup (1,oo)`

Solution :`S=r+1/r`
`SIN(-oo,-2)cup(2,oo)`


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