Question

Si 3^n=2 .
Halle R=3^2n+3^-n+9^-n

Answer 1

3^2n = 2^2 = 4
3^(-n) = 1/3^n = 1/2
3^(-2n) = 1/2^2 = 1/4

3^2n+3^-n+8^-n
4 +1/2 + 1/4
=37/8