1.以下有哪些数比36大?第一题
360.8^2 .......36/0.8
选36/0.8
2.像框宽度为1是总面积为m,宽度为2时总面积为m+52. 问:像片周长.
-=52, 得2=40
3.f=2^x3^y5^z , x,y,z分别为n 的百,十,分位, f=9f, m-n=?
答案:20
4.十个人吃饭,每次只能安排4个,有几种安排?
c10,4
5.有四个box,每个里装m支marbal,要重新打乱,使每个box里的数目比为:1:6:5:4. 问:需要动几支marbel?
答案:3/4
6.a1=, a2=, a3=,a4=,数字我记不得了,反正a1+a2+a3+a4=3, an=an-4, 求a73?
答案:74
7.y角形ABC,D是AB的中点,F是CD的中点,三角形BFC的面积是1,求三角形ABC的面积。
8. k和n 整数,kn? k-2和n+2不是连续偶数。 k-3和n+3是连续奇数。
9. Y件商品的总成本是X,商人以每件高于平均成本65%的价格卖出,但卖出的商品中有百分之八的defective,问customer买到defective的可能性?
10. 代表当3X被2除时的余数,问以下那个式子在X为任何整数时均为1
A:
B:+1
C:2
11. 数列a1,a2...an。a1and a2 正整数,n=3时,an an-1/an-2 余数,a4 第一个zero.a3=6. a1可能是下列哪个数?48,49,52,51,50。可能数值不准。
12.三角形ABC.E是AB的中点,F是EC的中点.三角形BFC的面积是1,求三角形ABC的面积 A:1.5 B:2.5 C:3,D:3.5.E:4.
13. 数列:a1,a2,a3.... an.a1,a2是正数.对n=3,an是a divide by a的余数.a3=6,a4是第一个出现0的数列的项.问下面哪个可能a1的值.A:48,B:49,C:50,D:51,E:52
14.n,k都是正整数n+k8.问nk有多少个不同的值 A:8,B:10,C:11:D:12,E:14
15.a,b都是正数.是否可以确定^-1 与 的大小
A) a=2b,B)a+b1, I chose B
16.Y=-2^2 + 500, 早上2点开始放水, 到几点的时候池里面的水放到最满。
作者答案及思路:7点
remeo评价意见:7点.根据提供的方程,最大值应该是在T=5的时候,5个小时,所以是7点.
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