陈向东 最新GRE数学预测模拟试题4第22题
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陈向东 最新GRE数学预测模拟试题4第22题
If a is increased by 25% and b is decreased by 25%,the resulting numbers will be equal.What is the ratio of a to
这里的resulting numbers是什么意思?a和b是怎样的相互关系?
If a is increased by 25% and b is decreased by 25%,the resulting numbers will be equal.What is the ratio of a to
这里的resulting numbers是什么意思?a和b是怎样的相互关系?
是不是说如果a增加25%(a*1.25),b减少25%(b*0.75),他们的结果(resulting number)将会相等
a*1.25=b*0.75
a/b=3/5
a*1.25=b*0.75
a/b=3/5