Question 39
Sequences and SeriesThe sum, Sn, of a sequence is given by Sn = 2n2 − 5. Find the 6th term.
- A.112
- B.67
- C.45
- D.22
Show the answer and explanation
Answer: D (22)
Explanation
T₆ = S₆ − S₅ = (72 − 5) − (50 − 5) = 67 − 45 = 22.
The sum, Sn, of a sequence is given by Sn = 2n2 − 5. Find the 6th term.
Answer: D (22)
T₆ = S₆ − S₅ = (72 − 5) − (50 − 5) = 67 − 45 = 22.