1.

Ifp_1 ,p_2,p_3 are the lengthsof altitudesofDelta ABCfrom the vertices andDeltais the area ofDelta ABC " then "(1)/(p_1)+(1)/(p_2)- (1)/( p_3)=

Answer»

` (s-a)/( DELTA ) `
` (s-c)/( Delta ) `
` (s-B)/( Delta ) `
` (s)/( Delta ) `

ANSWER :B


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