Question

tell this please for extra points​

Answer 1

Answer:

Answer:

14/9

Step-by-step explanation:

z=7^(n+2)-3×7^(n+1)/20×7^(n)-2×7^(n)

let 7^n=x

then z=( x*7^2-3*7*x) / (20x-2x)

=(49x-21x)/18x

=28x/18x

=28/18

=14/9

Answer 2

Answer:

hope it helps you

refer to attachment