举报
(1) yz>0
(2) xz>0
Answer:B x*y^2*z^3=(x*z)*(y*z)^2>0
这道题是否应该选C? 因为如果y=0,B就不成立了
NN 们给解释解释,谢谢
请教NN
385. 一共100人,more people were born in October than in any other month。What is the least possible number of people born in October?
ANSWER:8,9,10,11,12 选 10 同JJ 340题
为什么不是11呢? 如果是10的话, 就可能有两个月都是10,(别的月8),这样就违反了more people were born in October than in any other month
381 某数是5的乘积,被4除其余数是奇数,问该数被6除于几?
A 被8 除余3(都记不清了,应该不行)
B 被12除于3
ANSWER:B。B的数列是(15+60N)
哪位NN给讲一下这个B的数列是(15+60N)是咋回事?谢先
354 c(2,1)行不行
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