标题: 陳向東GRE數學第57題 數學題 想不通啊? [打印本页] 作者: amber4cdream 时间: 2015-9-19 15:16 标题: 陳向東GRE數學第57題 數學題 想不通啊? n= k+r/s /t/v
In the equation above, k,r,s,t and v represent positive numbers.
Multiplying which one of these numbers by 2 will reduce the value
of n to 1/2 of its present value?
(a) k (b) r (c) s (d) t (e) v
Multiplying which one of these numbers by 2
是把数字乘以2的意思吧?
解答上说:要让n变成1/2倍,分母要多一倍,所以t要多一倍,所以答案是(d) t
可是没有数字被乘以2呢?