If a,b,c are in A.P. prove that: (i) (a...

If a,b,c are in A.P. prove that:
(i) `(ab)^(-1),(ca)^(-1)` and `(bc)^(-1)` are also in A.P.
(ii)`(ab+ac)/(bc),(bc+ca)/(ca),(ca+cb)/(ab)` are also in A.P.

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The correct Answer is:

a,b,c are in A.P. which is true.

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