If R = {(x,y)| y = 3x + 2}, then R
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If R = {(x,y)| y = 3x + 2}, then R -1 = x = 3y + 2 (2) y = (x – 2)/3 - PowerPoint PPT Presentation


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If R = {(x,y)| y = 3x + 2}, then R -1 = x = 3y + 2 (2) y = (x – 2)/3 {(x,y)| y = 3x + 2} (4) {(x,y)| y = (x – 2)/3} (5) {(x,y)| y – 2 = 3x} (6) {(x,y)| y = x/3 – 2}. What is the first line of this proof? Let x  R. Let x  R -1 . Let (x,y)  R.

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  • If R = {(x,y)| y = 3x + 2}, then R-1 =

  • x = 3y + 2 (2) y = (x – 2)/3

  • {(x,y)| y = 3x + 2} (4) {(x,y)| y = (x – 2)/3}

  • (5) {(x,y)| y – 2 = 3x} (6) {(x,y)| y = x/3 – 2}



  • What is the first line of this proof?

  • Let x  R. (2) Let x  R-1.

  • Let (x,y)  R. (4) Let (x,y)  R-1.

  • Let (x,y)  Dom(R) (6) Let (x,y)  Dom(R-1)

  • (7) Let x  Dom(R) (8) Let x  Dom(R-1)






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