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(i) The 4th, 7th and 10t terms of a G.P....

(i) The 4th, 7th and 10t terms of a G.P. are a,b,c respectively. Show that `b^(2)=ac`.
(ii) If the 4th, 10th and 16th terms of a G.P are x,y,z respectively, prove that x,y,z are in G.P.

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