Question

If x+1÷x=5 then x^19+1÷x^19=?​

Answer 1

1/x + x = 5

simply square both sides:

(1/x + x)^2 = 5^2

1/x^2 + 2(1/x)(x) + x^2 = 25

1/x^2 + 2 + x^2 = 25

1/x^2 + x^2 = 23

Explanation: