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If a , b , c are in H.P. , then...

If a , b , c are in H.P. , then

A

`a/(b + c - a) , b/(c+a-b) , c/(a+b-c)` are in H.P.

B

`2/b = 1/(b -a) + 1/(b - c)`

C

a - b/2 , b/2 , c-b/2 are in G.P.

D

`a/(b+c) , b/(c + a) , c/(a + b)` are in H.P

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A, B, C, D
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