Question 17
Sequences and SeriesThe third term of geometric progression (G.P.) is 10 and the sixth term is 80. Find the common ratio.
- A.2
- B.3
- C.4
- D.8
Show the answer and explanation
Answer: A (2)
Explanation
ar5 ÷ ar2 = 80 ÷ 10, so r3 = 8 and r = 2.