A = {x ∈ Z : x is an integer multiple of 3}. B = {3,9,21} C = {2,11,4,14,2} D = {x ∈ R : 1 < x < 5} E = {∅} 4(g) C ⊆ C 4(h) π ⊂ D 4(i) {π} ⊂ D

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Problem 4. Use the definitions for the sets given below and definitions for common sets given in the lecture slides to determine whether each statement is true or false.

  • = {∈ Z : is an integer multiple of 3}.
  • = {3,9,21}
  • = {2,11,4,14,2}
  • = {∈ R : 1 < x < 5}
  • = {∅}

4(g) ⊆ C

4(h) π ⊂ D

4(i) {π} ⊂ D

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