Question

Find the arithmetic mean a_n of the given terms.

a_(n-1)=-2x, a_(n+1)=2x

Answer 1

arithmetic mean is just the average, so, add them and divide it by 2,
\(\large a_n = \dfrac{a_{n-1}+a_{n+1}}{2}\)

Answer 2

Oh so like...\[\frac{ -2x+2x }{ 2 }\] But it would equal 0 then

Answer 3

thats your arithmetic mean!

Answer 4

and is correct :)

Answer 5

Ohh so 0 is the answer? Okay thank you! I made it harder than it was

Answer 6

welcome ^_^