Let `I` be an interval disjointed from `[-1,\ 1]` . Prove that the function `f(x)=x+1/x` is increasing on `I` .

Let I be any interval disjoint from [-1,1] Prove that the function f given by f(x) = x + 1/x is increasing on I.

Let I be any interval disjoint from [-1,1] . Prove that the function f given by f(x)=x+(1)/(x) is increasing on I.

Let 1 be any interval disjoint form (-1,1). Prove that the function f(x) = x +1/x is strictly increasing on I.

Let I be any interval disjoint from [–1, 1]. Prove that the function f given by f(x) =x+(1)/(x) is increasing on I.

Let I be any interval disjoint from [–1, 1]. Prove that the function f given by 1 f(x) =x+(1)/(x) is increasing on I.

Let I be any interval disjoint from [–1, 1]. Prove that the function f given by 1 f(x) =x+(1)/(x) is increasing on I.

Let I be any interval disjoint from [-1,1] . Prove that the function f given by f(x)=x+1/x is strictly increasing on I.

Let I be any interval disjoint from (1, 1) . Prove that the function f given by f(x)=x+1/x is strictly increasing on 1.