9514 1404 393
Answer:
74
Step-by-step explanation:
The recursive definition is for an arithmetic sequence with a first term of -6 and a common difference of 4.
The general term of such a sequence is ...
a(n) = a(1) +d(n -1)
This sequence is ...
a(n) = -6 +4(n -1) = 4n -10
Then for n = 21, the term is ...
a(21) = 4(21) -10 = 84 -10
a(21) = 74
