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In 19-22, determine whether each statement is true or false. If the statement is false, give a coun- terexample. (a) If a and b are

In 19-22, determine whether each statement is true or false. If the statement is false, give a coun- terexample. (a) If a and b are real numbers then: ( at b) 2. = a2 + 62 ( b ) If a > b then a? > b2. (c) If a > b then a3 > b3

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