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Dumb_as_a_Duck 3 years ago Given,

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1. satellite73

taken

2. atjari

what is given?

3. Dumb_as_a_Duck

A = {${x:-2\le x-1\le4,x \in R}$} and B = {$x: -5 \le x-1 \le 2, x \in R$} Represent A-B on a number line.

4. Dumb_as_a_Duck

Is this right|dw:1331386408686:dw|

5. Dumb_as_a_Duck

?

6. satellite73

$A=\{x:-2\le x-1\le4,x \in R\}$ solve for x get $A=\{x:-1\le x-1\le5,x \in R\}$

7. satellite73

that was wrong, solve for x get $A=\{x:-1\le x\le5,x \in R\}$

8. Dumb_as_a_Duck

you mean -1 less than or equal to x less than or equal to 5. theres no -1/

9. TuringTest

yeah, start with drawing both A and B then remove the B part of the line what is left is A-B

10. satellite73

similarly $B=\{x:-4\le x\le3,x \in R\}$

11. satellite73

and i assume A-B means what is in A that is not in B

12. satellite73

which would be (3,5]

13. TuringTest

|dw:1331388526284:dw|

14. TuringTest

|dw:1331388708918:dw|um... what do we do with the part on the left satellite?

15. TuringTest

@satellite73 do we ignore the left-over part from B to the left of -1 ?

16. Dumb_as_a_Duck

so the numbers that come under A-B are.....? (just clarifing)

17. TuringTest

to quote satellite: "and i assume A-B means what is in A that is not in B which would be (3,5]"

18. Dumb_as_a_Duck

shouldnt it be (4,5)? :/

19. Mani_Jha

It should be (3,5) because A is (-1,5) and B is (-4,3) |dw:1331393158512:dw| Just cancel out the common part. Did u get it from the figure?

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