Of the following functions from R toR, which are injective? which are surjective?Which are bijective?
1. λx.x2
2. λx.x3
3. sine
4. λx. |x|
5. λx.(x3 – x2)
6. λx. ex
In each case, tell whether there is an injection from Ato B, whether there is a surjection from A toB, and whether there is a bijection from A toB.
7. A = {10,20,30}, B = {8, 9, 10, 11, 12}
8. A = {10, 73}, B = {9,109}
9. A = {12, 8, 7, 6}, B = {4, 3, 2}
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