1.

If r_1 , r_2 , r_3are the radii of the escribed circles of a Delta ABCand if r is the in radius then r_1r_2r_3-r( r_1r_2+r_2r_3+r_3r_1)

Answer»

` 0`
` 1`
` 2`
`3`

ANSWER :A


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