Question
If three positive numbers $a, b, c$ are in H.P., then $a^{n}+c^{n}$$(\mathrm{A})>2 b^{n}$$(\mathrm{B})=2 b^{n}$$(\mathrm{C})<2 b^{n}$$(\mathrm{D})>b^{n}$
Step 1
Step 1: Since $a, b, c$ are in harmonic progression, we have $\frac{1}{b} = \frac{1}{2}(\frac{1}{a} + \frac{1}{c})$. Show more…
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