Question 25
ProgressionsA sequence is given by 2 1/2, 5, 7 1/2, ....... If the nth term is 25, find n.
- A.9
- B.10
- C.12
- D.15
Show the answer and explanation
Answer: B (10)
Explanation
a = 2½ and d = 2½, so Tn = 2½n = 25 gives n = 10.
A sequence is given by 2 1/2, 5, 7 1/2, ....... If the nth term is 25, find n.
Answer: B (10)
a = 2½ and d = 2½, so Tn = 2½n = 25 gives n = 10.