Answer: 4n
Step-by-step explanation:
Your very stupid but the answer is 4
-1/2 (t+3) -10 = -6.5
t = - 10
I'd say it's "convergent and doesn't have a sum"
because it's multiplying by 3 to get every new number and switching between ± after every new number. there is no sum because it's an infinite series.