Question 5
ProgressionsThe nth term of a sequence is Tn = 5 + (n − 1)2. Evaluate T4 − T6.
- A.30
- B.16
- C.−16
- D.−30
Show the answer and explanation
Answer: C (−16)
Explanation
T4 = 5 + 9 = 14 and T6 = 5 + 25 = 30, so T4 − T6 = −16.
The nth term of a sequence is Tn = 5 + (n − 1)2. Evaluate T4 − T6.
Answer: C (−16)
T4 = 5 + 9 = 14 and T6 = 5 + 25 = 30, so T4 − T6 = −16.