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If the `p t h ,\ q t h\ a n d\ r t h` terms of `a` G.P. are `a ,\ b ,\ c` respectively, prove that: `a^(q−r).b^(r−p).c^(p−q)=1`

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a=pth term =`AR^(p−1)`
b=qth term =`AR^(q−1)`
c=rth term `=AR^(r−1)`
Substituting values of a,b & c, we get,
...
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