limit a(power n)+b(power n)/a(power n)-b(power n)

x->infinity

Pleaseanswer this question...!

first of all it is n->infinty not x->infinity

and it should be given whether a>b or b>a

if a>b

ans is 1

if b>a

ans is -1

since it is of form

1+(b/a)^n /1-(b/a)^n

where b/a can be greater or less than 1