Answer:
16th term is 0.
S1ep-by-step explanation:
5th term = a1 + d(5 - 1) = 11 where a1 = first term and d = common difference
9th term = a1 +d(9 - 1) = 7 where a1 = first term and d = common difference.
a1 + 4d = 11
a1 + 8d = 7
Subtracting:
4d - 8d = 11-7
-4d = 4
d = -1.
So a1 = 11 - 4(-1) = 15.
16th term = 15 - 1(16-1)
= 15 - 15
= 0.
