考试惨败, 带少量狗回

mengdong

21.   1+2+2^2+2^3+……2^n，求N=9时前面的式子得多少?
答案有(10^5+1)(10^5-1)
(10^5-1)(10^5-1)

68.     m能够表示成a+b+c（a,b,c是连续正整数）  也能表示成x*y*z（x,y,z也是连续正整数）  问m被5除余1?  (补充原题)
（1）    a被5除余1
（2）    x被5除余1

95.   A、B两人加起来的钱是9000，A的钱是B的3倍少300，其中大的数?
(C)6500
(D)6675
(E)6800

有一个球形moon半径1600Km, 什么东西在其地面高400km走一圈, 问走了多少路径?

AW
124. The following appeared in a memorandum from the owner of Carlo’s Clothing to the staff.
“Since Disc Depot, the music store on the next block, began a new radio advertising campaign last year, its business has grown dramatically, as evidenced by the large increase in foot traffic into the store. While the Disc Depot’s owners have apparently become wealthy enough to retire, profits at Carlo’s Clothing have remained stagnant for the past three years. In order to boost our sales and profits, we should therefore switch from newspaper advertising to frequent radio advertisements like those for Disc Depot.”

34. “All citizens should be required to perform a specified amount of public service. Such service would benefit not only the country as a whole but also the individual participants.”

windypig123

加油~我昨天也没考好

cat19bear

21.   1+2+2^2+2^3+……2^n，求N=9时前面的式子得多少?

这个貌似是 等比数列求和的问题 不过 an = 2^(n-1) , Q = 2，a1 = 1

S10 = a1 * (1-Q ^(10)) / (1 - Q) = 2 ^ 10 -1

68 -  A, B 每个条件都充分， 应该选C


95 - 6675 吧

pennyconan

LZ看看是不是这个
1+2+2^2+2^3+……2^n，求n=9
1023   选项是这个(2^5+1)(2^5-1)

xinxinokkk

加油~我昨天也没考好

-- by 会员 windypig123 (2010/4/30 5:30:23)

我也惨败。。。那大概我们在考场见过吧，呵呵，加油～继续不放弃

luningzhao

球形那个应该怎么做呢

jiayini85

感谢遛狗 别放弃 继续加油哦！

spz316

球形那个应该怎么做呢

-- by 会员 luningzhao (2010/4/30 17:46:39)

应该是以2000KM为半径的圆的周长，是4000π吧