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If p1,\ p2,\ p3 are the altitudes of a t...

If `p_1,\ p_2,\ p_3` are the altitudes of a triangle from its vertices `A ,\ B ,\ C` and `"Delta"` , the area of the triangle `A B C ,` then `1/(p_1)+1/(p_2)-1/(p_3)` is equal to `s/"Delta"` (b) `(s-c)/"Delta"` (c) `(s-b)/"Delta"` (d) `(s-a)/"Delta"`

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