NewCDer -JJ discussion Q30.

kapuser · 发表于 2007-7-29 16:46:00

30. DS题比较w^2/(w-1)和w哪个大, 条件１）２）好像分别是w的两个值域。

大家把w^2/(w-1)的分母-1 然后+1,化成w+1+(1/(w-1))就很好比较了

What does it mean by 把w^2/(w-1)的分母-1 然后+1,化成w+1+(1/(w-1)) ?? could anyone explain??

把w^2/(w-1)的分母-1 然后+1,化成w+1+(1/(w-1)) ?? could anyone explain??

Thank you very much~~~!!!

xinyueli_1983 · 发表于 2007-7-29 20:28:00

w^2-1+1/w-1=(w+1)(w-1)+1/w-1=(w+1)-1/w-1然后再和W进行比较!

kapuser · 发表于 2007-7-30 02:11:00

以下是引用xinyueli_1983在2007-7-29 20:28:00的发言：
w^2-1+1/w-1=(w+1)(w-1)+1/w-1=(w+1)-1/w-1然后再和W进行比较!

Hi, xinyueli,

Thank you for replying. =)

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