|x-y+3|與|x+y-99|均為非負(fù)數(shù)
非負(fù)數(shù)的范圍：正數(shù)和0
相反數(shù)的和為0
也就是|x-y+3|+|x+y-99|=0
x-y+3=0 ①
x+y-99=0 ②
由①得：x-y=-3 ③
由②得：x+y = 99 ④
③/④就得出x-y除以x+y的值
（x-y)/(x+y)=-1/33
|x-y+3|與|x+y-99|互為相反數(shù),求x-y除以x+y的值
|x-y+3|與|x+y-99|互為相反數(shù),求x-y除以x+y的值
rt
rt
數(shù)學(xué)人氣：571 ℃時(shí)間：2020-06-29 01:44:35
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