if the 4th,10th and 16th terms of a G.P. are x,y and z respectively ,prove that x,y and z are in G.P.
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let first term of GP be a and common ratio be r
than 4th term is ar^3
10 th term is ar^9
16 the term is ar^15
ar^3,ar^9,ar^15
are in gp with common ratio r^6
hence proved
than 4th term is ar^3
10 th term is ar^9
16 the term is ar^15
ar^3,ar^9,ar^15
are in gp with common ratio r^6
hence proved
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