the answer should be E
if x and y must not be integer,
since in (1)x<8, y<3, can find many combination to meet the equation
in(2) x<2,y<2 can also find many combiantion to meet the equation
but no any answer can meet the two equation at the same time
if x and y must be integer, then no answer to meet any of the two equations
rgiht?
the idea in upstair is wrong
since y=0, then 2^x=255, x will not be an integer作者: 卧室春竹 时间: 2003-1-8 19:00
对...e作者: steven.wei 时间: 2003-1-8 20:11
多谢，多谢。
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