POSTTEST Read the questions carefully. Encircle the letter of th
1. Which of the following function is not one-to-
A. {(0, 1), (1, 2), (2, 3), (3, 4)}
C.
B. {(0, 0), (1, 1), (2, 2), (3, 3)}
D.
2. Which function is one-to-one?
A. f(x) = x4 + 3
B. f(x) = x +3
C. f(x)
D. f(x)
3.
All of the following graph is one-to-one function EX

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?