find the arithmetic mean of a_n

Question

a_(n-1) = 8 and a_(n+1)=- 3

Answer 1

To find the arithmetic mean of a_n, we can sum up a_(n-1) and a_(n+1) and then divide by 2.

a_(n-1) = 8
a_(n+1) = -3

Arithmetic mean = (8 + (-3)) / 2
Arithmetic mean = 5 / 2
Arithmetic mean = 2.5

Therefore, the arithmetic mean of a_n is 2.5.