1.

Prove that 2 is a even number.​

Answer»

Step-by-step explanation:

Since k is an integer, 2k2 is also an integer, so we can WRITE x2 = 2l for the integer l = 2k2. By definition, this means x2 is an even number. In proof by CONTRADICTION, you assume your statement is not TRUE, and then derive a con- tradiction.

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