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If A1, A2, G1, G2, ; a n dH1, H2 are two...

If `A_1, A_2, G_1, G_2, ; a n dH_1, H_2` are two arithmetic, geometric and harmonic means respectively, between two quantities `aa n db ,t h e na b` is equal to `A_1H_2` b. `A_2H_1` c. `G_1G_2` d. none of these

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