What are the domain and range of f? What is the inverse of f? Corppute fof fof. 1.4. REFERENCES AND SUGGESTED READINGS 24. Let f: X→Y be a map with A₁, A2 C X and B₁, B₂CY. (a) Prove f(A₁ U A₂) = f(A1) Uf(A₂). (b) Prove f(A₁A₂) c f(A1) nf(A₂). Give an example in which equality fails. (c) Prove f-¹(B₁ U B₂) = f(B₁) Uf-(B₂), where f¹(B) = (x EX: f(x) = B). (d) Prove f-¹(B₁ B₂) = f'(B₁) nf-¹(B₂). (e) Prove f-¹(Y\B₁)=X\f-¹(B₁). 25. Determine whether or not the following relations are equivalence relations on set. If the relation is an equivalence relation describe the partition given by

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Only need help with 24 b and d
X
z-1'
What are the domain and range of f? What is the inverse of f? Corppute fof
f-¹ of.
1.4. REFERENCES AND SUGGESTED READINGS
24. Let f: X→Y be a map with A₁, A2 C X and B₁, B₂ C Y.
(a) Prove f(A₁ U A₂) = f(A₁) U f(A₂).
(b) Prove f(A₁A₂) c f(A1) n f(A2). Give an example in which equality fails.
(c) Prove f-¹(B₁ U B₂) = f'(B₁) Uf-¹(B₂), where
f-¹(B) = {EX: f(x) e B).
(d) Prove f-¹(B₁n B₂) = f'(B₁) nf-¹(B₂).
(e) Prove f-¹(Y\ B₁)=X\f¹(B₁).
25. Determine whether or not the following relations are equivalence relations on t
set. If the relation is an equivalence relation describe the partition given by
Transcribed Image Text:X z-1' What are the domain and range of f? What is the inverse of f? Corppute fof f-¹ of. 1.4. REFERENCES AND SUGGESTED READINGS 24. Let f: X→Y be a map with A₁, A2 C X and B₁, B₂ C Y. (a) Prove f(A₁ U A₂) = f(A₁) U f(A₂). (b) Prove f(A₁A₂) c f(A1) n f(A2). Give an example in which equality fails. (c) Prove f-¹(B₁ U B₂) = f'(B₁) Uf-¹(B₂), where f-¹(B) = {EX: f(x) e B). (d) Prove f-¹(B₁n B₂) = f'(B₁) nf-¹(B₂). (e) Prove f-¹(Y\ B₁)=X\f¹(B₁). 25. Determine whether or not the following relations are equivalence relations on t set. If the relation is an equivalence relation describe the partition given by
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