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If a,b and c also represent the sides of...

If a,b and c also represent the sides of a triangle and a,b,c are in g.p then the complete set of `alpha^2 = (r^2 +r +1)/(r^2-r+1)`is

A

`(1/3,3)`

B

`(2,3)`

C

`(1/3,2)`

D

`(sqrt(5+3)/2,3)`

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CENGAGE-PROGRESSION AND SERIES-Exercise (Multiple & Comprehension)
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