1.

the pth, qth and oth terms of a G. P. be respectively a, b and cove that (V)())-1.

Answer»

given,

a = xyp-1, b = xyq-1and c = xyr-1 here, x is first term and y is common ratio

as, G²= AH we ahve,

b²=ac

xyq-1

aq-r= xq-r* y(p-1)(q-r)

br-p = xr-p* y(q-1)(r-p)

cp-q= xp-q* y(p-q)(r-1)

multiply all 3 of them, we get RHS,

x⁰* y⁰= 1

henc proved.



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