If \( \frac{1}{b-a}+\frac{1}{b-c}=\frac{1}{a}+\frac{1}{c} \), then \( a, b, c \) are in H.P.

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If \( \frac{1}{b-a}+\frac{1}{b-c}=\frac{1}{a}+\frac{1}{c} \), then \( a, b, c \) are in H.P.
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