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In a triangle ABC, if a^(2)-b^(2)-c^(2)=...

In a triangle `ABC`, if `a^(2)-b^(2)-c^(2)=bc(lambda^(2)-2lambda-1)`, then

A

`0 le lambda le 4`

B

`-1 le lambda le 2`

C

`-1 le lambda le 3`

D

`0 le lambda le 3`

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The correct Answer is:
C
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