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Arrange the following statements to create a proof by contrapositive for If x + y 2 then x 1 or y 1 .

Arrange the following statements to create a proof by contrapositive for

"

x + y 2

then

x 1

y 1 " .

Suppose it is not the case that

x 1

y 1 .

which is the negation of

x + y 2

x 1

and

y 1

x + y 2

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