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If a,b,c are all positive and are p-th,q...

If a,b,c are all positive and are p-th,q-thand r-th terms of a G.P ., then show that `|{:(loga,p,1),(logb,q,1),(logc,r,1):}|=0`.

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The correct Answer is:
[`C_1^'=C_1-(logR)C_2-(logA)C_3]=0`
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