1.

Two systems of rectangular axis have the same origin. If a plane cuts them at distances a, b, c and a', b', c', respectively from the origin, then prove that (1)/(a^2)+(1)/(b^2)+(1)/(c^2)=(1)/((a')^2)+(1)/((b')^2)+(1)/((c')^2).

Answer»


ANSWER :`(1)/(a^2)+(1)/(b^2)+(1)/(C^2)=(1)/((a')^2)+(1)/((b')^2)+(1)/((c')^2)`
which is REQUIRED RESULT


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