alleryIn a G.P. the 5th term is 81 and the 2nd term is 3. The common ratio is:
A$\tfrac{1}{3}$
B3
C9
D27
Answer & Solution
Correct answer: B. 3
We have ar⁴ = 81 and.
Then ar = 3 ⟹ r³.
That is ar = 27 ⟹ r.
So ar = 3.
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