If \[a,\ b,\ c\] are in H.P., then which one of the following is true [MNR 1985]

\[\frac{1}{b-a}+\frac{1}{b-c}=\frac{1}{b}\]

\[\frac{b+a}{b-a}+\frac{b+c}{b-c}=1\]

If \[a,\ b,\ c\] are in H.P., then which one of the following is true

1.	If \[a,\ b,\ c\] are in H.P., then which one of the following is true [MNR 1985]
A.	\[\frac{1}{b-a}+\frac{1}{b-c}=\frac{1}{b}\]
B.	\[\frac{ac}{a+c}=b\]
C.	\[\frac{b+a}{b-a}+\frac{b+c}{b-c}=1\]
D.	None of these
Answer» E.

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If \[a,\ b,\ c\] are in H.P., then which one of the following is true [MNR 1985]

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