Sagot :
ANSWER
For (-5,5) = -5 < x < 5
- The parenthesis implies that -5 and 5 is not included , but the integers between them are included.
- elements = {-4,-3,-2,-1,0,1,2,3,4}
For [-5,5] = -5 ≤ x ≤ 5
- The bracket implies that -5 and 5 are included together with the integers between them.
- elements = {-5,-4,-3,-2,-1,0,1,2,3,4,5}
For [-5,5) = -5 ≤ x < 5
- This set-builder notation implies that -5 is included while 5 is excluded , together with the integers between them.
- elements = {-5,-4,-3,-2,-1,0,1,2,3,4}
For (-5,5] = -5 < x ≤ 5
- This set-builder notation implies that -5 is excluded on the integers between -5 and 5 , note that 5 is included because the symbol is a bracket.
- elements = {-4,-3,-2,-1,0,1,2,3,4,5}
Remember
- [ ] when the symbol is a bracket , they are included
- ( ) when the symbol is a parenthesis , they are not included (excluded)