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anonymous
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taken

atjari
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1
what is given?

Dumb_as_a_Duck
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A = {\[{x:2\le x1\le4,x \in R} \]}
and
B = {\[x: 5 \le x1 \le 2, x \in R\]}
Represent
AB on a number line.

Dumb_as_a_Duck
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Is this rightdw:1331386408686:dw

Dumb_as_a_Duck
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?

anonymous
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\[A=\{x:2\le x1\le4,x \in R\}\] solve for x get
\[A=\{x:1\le x1\le5,x \in R\}\]

anonymous
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that was wrong, solve for x get
\[A=\{x:1\le x\le5,x \in R\}\]

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

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

anonymous
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similarly
\[B=\{x:4\le x\le3,x \in R\}\]

anonymous
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and i assume AB means what is in A that is not in B

anonymous
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which would be (3,5]

TuringTest
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dw:1331388526284:dw

TuringTest
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dw:1331388708918:dwum... what do we do with the part on the left satellite?

TuringTest
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@satellite73 do we ignore the leftover part from B to the left of 1 ?

Dumb_as_a_Duck
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so the numbers that come under AB are.....? (just clarifing)

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

Dumb_as_a_Duck
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shouldnt it be (4,5)? :/

Mani_Jha
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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?