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If p is the length of perpendicular from...

If p is the length of perpendicular from the origin onto the plane whose intercepts on the axes area a,b,c then (A) `a+b+c=p` (B) `a^-2+b^-2+c^-2=p^(-2)` (C) `a^(-1)+b^(-1)+c^(-1)=p^(-1)` (D) `a^(-1)+b^(-1)+c^(-1)=1

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