Classify each function as injective, surjective, bijective, or none of these.

1. $\displaystyle F: $ $\displaystyle [3,\infty) \rightarrow [5, \infty)$ defined by $\displaystyle F(x) = (x+3)^2 - 5$

Show that the following pairs of sets S and T are equinumerous by finding a specific bijection between the sets in each pair.

(d) S = (0,1) and T = (0,$\displaystyle \infty$)

I dont understand how to d really at all. I know with easier points we were just finding the line from the two points, but im not quite sure how to deal with harder or bigger points.