Question

i will mark the brainliest who gives the right answer ​

Answer 1

3n×9n+1/3n-1×9n-1

=3n×3(n+1)2/3n-1×3(n-1)2

=3n×3 2n+2/3n-1×3 2n -2

=3n+2n+2/3n-1+2n-2

=3 3n+2/3n-3

=3 3n+2-3n-3

=3 -1