From the given functions that are mapped from Z to Z. identify the onto functions. (Check all that apply) Check All That Apply n -1
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- For each of the following parts, give an example of a mapping from E to E that satisfies the given conditions. a. one-to-one and onto b. one-to-one and not onto c. onto and not one-to-one d. not one-to-one and not onto27. Let , where and are nonempty. Prove that has the property that for every subset of if and only if is one-to-one. (Compare with Exercise 15 b.). 15. b. For the mapping , show that if , then .Let a and b be constant integers with a0, and let the mapping f:ZZ be defined by f(x)=ax+b. Prove that f is one-to-one. Prove that f is onto if and only if a=1 or a=1.
- Suppose thatis an onto mapping from to. Prove that if ℒ, is a partition of, then ℒ, is a partition of.10. Let and be mappings from to. Prove that if is invertible, then is onto and is one-to-one.8. For the given subsets and of Z, let and determine whether is onto and whether it is one-to-one. Justify all negative answers. a. b.
- For an element x of an ordered integral domain D, the absolute value | x | is defined by | x |={ xifx0xif0x Prove that | x |=| x | for all xD. Prove that | x |x| x | for all xD. Prove that | xy |=| x || y | for all x,yD. Prove that | x+y || x |+| y | for all x,yD. Prove that | | x || y | || xy | for all x,yD.Give an example of mappings and such that one of or is not onto but is onto.Prove that if a subring R of an integral domain D contains the unity element of D, then R is an integral domain. [Type here][Type here]