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p1,p2,p3 are the altitudes of a triangle...

`p_1,p_2,p_3` are the altitudes of a triangle ABC drawn from the vertices A,B and C respictively . If `Delta` is the area of the triangle and 2s is the sum of its sides, a,b and c then
`1/(p_1)+1/(p_2)-1/(p_3)=`

A

`(s-a)/Delta`

B

`(s-b)/(Delta)`

C

`(s-c)/(Delta)`

D

`s/ (Delta)`

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The correct Answer is:
D
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