Prove the intervals of real numbers (1,3) and (5,15) have the same cardinality by finding an appropriate bijective function of f:(1,3) ->(5,15) and verifying it is 1-1 and onto
I know there are multiple ways to prove one to one and onto im not sure
which one to use
However, what do i do to prove that cardinality are both infinite?
The Attempt at a Solution
Assume the intervals (1,3) and (5,15)