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Let a,b,c be the sides of a triangle. No...

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

A

`lamda lt 4/3`

B

`lamda gt 5/3`

C

`lamda in ((1)/(3), (5)/(3))`

D

`lamda in ((4)/(3), (5)/(3))`

Text Solution

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The correct Answer is:
A
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