1.

Prove that in Delta ABCS (( r_1- r_2) /( a) + ( r_2- r)/( b) + ( r_3- r)/( c ) ) = r_1+ r_2+ r_3 Prove that in Delta ABC

Answer»

` r_1 + r_2+r_3`
` r_1+ r_2- r_3`
` r_1- r_2+r_3`
` -r_1+r_2+r_3`

ANSWER :A


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