请教一道Prep数学

zhepeking

Because K can still be divisible by numbers other than 2.

-- by 会员 sdcar2010 (2011/1/29 13:23:43)

but it doesn't mean that k can not equal to 2(r)(就是2的r次方) for some positive integer r

sdcar2010

LS, condition 1 is not sufficient because k MIGHT = (any number) * 2^r

zhepeking

LS, condition 1 is not sufficient because k MIGHT = (any number) * 2^r

-- by 会员 sdcar2010 (2011/1/29 13:29:02)

明白了，我理解反了正好。。