the answere is E. did you ask cx+ty/c+t作者: tongxun 时间: 2002-11-2 17:46
The answer should be C
let 程序员: x, 统计员 : y
(ax+by)/(a+b) < (x+y)/2
(x+y)/2 -(ax+by)/(a+b) ) > 0
[(x+y)(a+b) - 2ax-2by]/2(a+b),
because a+b>0, we need to know whether (x+y)(a+b) - 2ax-2by >0
ax+bx+ay+by-2ax-2by = (a-b)(y-x)
a>b and y>x, (x+y)(a+b) - 2ax-2by >0作者: gigi 时间: 2002-11-2 20:22
答案是C,谢谢！
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