SRMJEE 2017 Paper with key

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Question : 79 of 155
 
Marks: +1, -0
If a, b, c are sides of a triangle and |
a2b2c2
(a+1)2(b+1)2(c+1)2
(a−1)2(b−1)2(c−1)2
|
=0
then ΔABC is
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