1. Let f: Z →{-1, 1} be given by flx) = f1 if x is even { -1 if x odd a. Prove or disprove that f is onto, b. Prove or disprove that f is one-to-one, c. Prove or disprove that f(x1 + x2) = f(x1) + f(x2),

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Chapter2: Second-order Linear Odes
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(1 if x is even
-1 if x odd
1. Let f: Z → {-1,1} be given by f(x) =-
a. Prove or disprove that f is onto,
b. Prove or disprove that f is one-to-one,
c. Prove or disprove that f(x1 + x2) = f(x1) + f(x2),
d. Prove or disprove that fx1 x2) = f(x1) f(x2).
Based on your responses to a-d can f be classified as an automorphism, endomorphism,
epimorphism, monomorphism, or isomorphism with respect to addition or multiplication?
Justify your response.
Transcribed Image Text:(1 if x is even -1 if x odd 1. Let f: Z → {-1,1} be given by f(x) =- a. Prove or disprove that f is onto, b. Prove or disprove that f is one-to-one, c. Prove or disprove that f(x1 + x2) = f(x1) + f(x2), d. Prove or disprove that fx1 x2) = f(x1) f(x2). Based on your responses to a-d can f be classified as an automorphism, endomorphism, epimorphism, monomorphism, or isomorphism with respect to addition or multiplication? Justify your response.
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