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If a, b, c are sides of a triangle, then...

If a, b, c are sides of a triangle, then `((a+b+c)^(2))/(ab+bc+ca)` always belongs to

A

[1,2)

B

`(-oo, 1] uu[2, oo)`

C

[2,3]

D

(-1,3)

Text Solution

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The correct Answer is:
A
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