How do I solve this question?

1. Let a: be a positive real mnuber. That is, let a: be a real number with a: 2 O and :1: 75 0. Show that there is a. positive real number 3; with :1: 2 y but :1: 75 y. Hint: You have to use the definition of 2 (page 26 of Cranks) to solve this problem. Even if you decide to do something like choose y = g (which may not be the easiest choice), you still have to Show that y 0 there is a natural number N so that Jan - L| N. We sometimes denote L by lim an n - 7 0O