1.

Let a,b and c be the sides of a triangle. No two of them are equal and lambda epsilonR. If the roots of the equation x^2+2(a+b+c)x+3lambda(ab+bc+ca)=0 are real, then

Answer»

`lambdalt4/3`
`lambdagt5/3`
`1/3ltlambdalt5/3`
`4/3ltlambdalt5/3`

ANSWER :A


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