determine whether wach of the following statements is true or false. give a
counter-example if it is dalse.
a)the product of two integers must be either positive or negative.
b)the product of a rational number and an irrational number must be irrational.
(they are both false,why?)
f.4 mathz
2009-10-01 6:34 am
回答 (1)
2009-10-01 6:36 am
✔ 最佳答案
Counter examples:(a) 5 * 0 = 0 is neither positive nor negative
(b) 0 * Pi = 0 is rational
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