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Let A = { x | x in N,x le 4 } , B ={ y|...

Let A = ` { x | x in N,x le 4 } , B ={ y|y in N, y le 3 } `
Represent ` A xx B and B xx A ` in a graph sheet . Can you see the difference between `A xx B and B xx A `

Answer

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Knowledge Check

  • If A= {(x,y) : y = e^(x), x in R } and B = { (x,y) : y = e^(-x), x in R } then n (A cap B ) is

    A
    Infinity
    B
    0
    C
    1
    D
    2
  • If n(A xx B) = 6 and A = {1, 3} then n(B) is

    A
    1
    B
    2
    C
    3
    D
    6
  • If A = {x:x^2 -5 x +6 =0},B={2,4 } , C={4,5 } , then A xx ( B cap C) is

    A
    `{(2,4) ,(3,4)}`
    B
    `{(4,2) ,(4,3)}`
    C
    `{(2,4),(3,4) ,(4,4)}`
    D
    `{(2,2),(3,3) ,(4,4) ,(5,5)}
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