To ask a new question, put a line and type your question. You can use LaTeX to type math. Here is a link to a short LaTeX tutorial.
To answer a question, open the page for editing and start typing below the question...
go back to the Discussion Page
I am having trouble with question 8 from our first HW. I am going back and trying to fix my old HW. I got back my HW and got a 0 out of 25. Can any one help get me started?
Thanks,
Andrew
8.(a)
$ f(1) = 1 / 1^2 = 1 / 1 = 1 $
$ f(2) = 1 / 2^2 = 1/4 $
$ f(E) = ${$ f(x) : 1 \le x \le 2 $}
$ 1/4 \le f(E) \le 1 $
Then, $ f(E) = ${$ y : 1/4 \le y \le 1 $}
(b)
$ f(1) = 1 / 1^2 = 1 / 1 = 1 $
$ f(2) = 1 / 4^2 = 1/16 $
$ f^(-1)(G) = ${$ x \in R, 1 \le x \le 4 : f(x) \in G $}
