标题:
PREP数学一道题求解谢谢!!
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作者:
viviansecret
时间:
2012-11-29 07:17
标题:
PREP数学一道题求解谢谢!!
If
p
is a
positive
odd
integer
, what is the
remainder
when
p
is
divided
by 4?
(1) When
p
is
divided
by 8, the
remainder
is 5.
(2)
p
is the sum of the squares of two
positive
integers.
答案选d,先问下第二个怎么单独得出啊?
作者:
Quadrifolia
时间:
2012-11-29 19:50
P奇数,且是两个数的平方和,则这两个数一定是一奇一偶,设P=(2K)^2+(2K+1)^2,则化简后P=8K^2+4K+1,所以reminder也是1~~
对不?~~~
作者:
viviansecret
时间:
2012-11-30 06:36
谢谢谢谢!!
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