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Problem 59. Consider the function f: (-1,1)-R by 1- z2 i. Show that f is a bijection. ii. Use this to show that all open inteProblem 50. For any u,vE R, define (u,v) -Ir e R u <r < v}. For any a, b, c,dER with a < b and c< d, find a bijection from (aYou do not have to prove problem 50. Just use the results as part of the proof for part (ii). Thanks, I will thumbs up.

Problem 59. Consider the function f: (-1,1)-R by 1- z2 i. Show that f is a bijection. ii. Use this to show that all open intervals of real numbers, (a, b), are uncountable (Hint: Use part i. and Problem 50.)
Problem 50. For any u,vE R, define (u,v) -Ir e R u
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尽a d-C Gi b-a thanks

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You do not have to prove problem 50. Just use the results as part of the proof for part (ii). Tha...
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