Find G.P. whose 4th & 7th terms 1/18 & -1/486 respectively.

Question

KnowledgeBoat · Accepted Answer

Let a be the first term and r be the common ratio. We know that, nth term of a G.P. is given by, Tn = arn - 1 Given, ⇒ 4th term of G.P is ⇒ ar4 - 1 = ⇒ ar3 = ....(1) Given, ⇒ 7th term of G.P. is ⇒ ar7 - 1 = ⇒ ar6 = ....(2) Divide Equation 2 by Equation 1: Substituting into Equation 1, we get: G.P. is, Hence, the G.P. is

Mathematics

Find G.P. whose 4th & 7th terms 1/18 & -1/486 respectively.

G.P.

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