1,If S is the sum of the reciprocals of the consecutive integers from 91 to 100,inclusive,which of the following is less than I.1/8 II.1/9 III.1/10A.NoneB.I onlyC.III onlyD.II and III onlyE.I,II,and III2,A certain quantity is measured on two differen

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/08 11:57:12

1,If S is the sum of the reciprocals of the consecutive integers from 91 to 100,inclusive,which of the following is less than I.1/8 II.1/9 III.1/10A.NoneB.I onlyC.III onlyD.II and III onlyE.I,II,and III2,A certain quantity is measured on two differen
1,If S is the sum of the reciprocals of the consecutive integers from 91 to 100,inclusive,which of the following is less than
I.1/8 II.1/9 III.1/10
A.None
B.I only
C.III only
D.II and III only
E.I,II,and III
2,A certain quantity is measured on two different scales,the R-scale and the S-scale,that are related linearly.Measurements on the R-scale of 6 and 24 correspond to measurements on the S-scale of 30 and 60,respectively.What measurement on the R-scale corresponds to a measurement of 100 on the S-scale?
A.20
B.36
C.48
D.60
E.84
看不出规律哦,不知道有什么关联...

1,If S is the sum of the reciprocals of the consecutive integers from 91 to 100,inclusive,which of the following is less than I.1/8 II.1/9 III.1/10A.NoneB.I onlyC.III onlyD.II and III onlyE.I,II,and III2,A certain quantity is measured on two differen
1.
看了上面的答案 咱先翻译一下题目吧.
S是91到100(不重复)的倒数的和.
S=1/91+1/92+...+1/100>1/100+1/100+...+1/100=1/10
故S>1/10.
S=1/91+1/92+...+1/100<1/91+1/91+...+1/91=10/91
故S<10/91
联立得 1/10即:1/10所以比S小的是 1/10.选C.
2.
24R-6R=60S-30S
18R=30S
18R/30=S
100S=100x18R/30=60R
选D .

1.
1/91+1/92...+1/100<10 x 1/91=10/91<10/90=1/9<1/8
所以S小于1/9,也就小于1/8
1/91+1/92...+1/100>10 x 1/100=1/10
所以S大于1/10
所以答案选C
2.
24R-6R=60S-30S
18R=30S
18R/30=S
100S=100x18R/30=60R
答案D

第一题选A,第二题不知道没看出来,第一题从91加到100的和为955,s=1/955,1/8=100/800 肯定大于s,1/9=100/900 也肯定大于s,1/10=955/9550 ,s=10/9550,所以s<1/10 所以没有一个比s小的

if the sum of the three continuous natural numbers is 99,the middle number is What is the greatest of 5 consecutive integers if the sum of these integers equals 185? 等比公式 S=A1/1-r 是什么?SATII 等比公式 S=A1/1-r 原文:if the absolute vable of ratio ,r,of a G.P is less than 1,then the sum ,S,of an infinite number of terms has an upper limit and is given by the formula:得出公式:S=A1/1-r 高 1s complement of the sum是啥意思? 1,If S is the sum of the reciprocals of the consecutive integers from 91 to 100,inclusive,which of the following is less than I.1/8 II.1/9 III.1/10A.NoneB.I onlyC.III onlyD.II and III onlyE.I,II,and III2,A certain quantity is measured on two differen 1 the tenth term of an arithmetic series is 67 and the sum of the first twenty terms is 1280.find the common difference ,d and the first term a .2 if the first term of an arithmetic sequence is 3 and the hundredth tern is 307,then find the sum of the write the following in algebraic form .(a) the sum of a and s is 3 . 一道英文数学题,看不懂啊,find the sum to n trems of the geometric series 108+60+33 1/3+...if k is the least number which exceeds this sum for all values of n,find k.find also the least value of n for which the sum exceeds 99% of k.thanks! what is the sum of 4 and success is the sum of details c++ find the column number(index) that have maximum sum of it's elementsYou task is to find the column number(index) that have maximum sum of it's elements.InputFirst line N and M (1 If sum of three consecutive integers is-21,find the largest integer.If sum of three consecutive integers is-21,find the largest integer.第二The sum of two numbers,A and B,is 33.If 3/5(分数,3在5上面)of A is equal to one half of B,find the two If the average(arithmetic mean)of 7 consecutive numbers is 16,what is the sum of the least and greates of the 7 integers? If number A minus the produce of 3 times as big as B,the result will be 51.If number Aplus the sum of 2 times as B ,the sum will be 111.Question:what is what is B 英翻中 英语翻译In sum,I strongly agree that the historian's proper function is to assemble evidence intoplausible constructs of history,and that an element of interpretation and even creativity isproperly involved in doing so.And if the speaker wishes t To sum it up,mature love is union under the condition of preserving one's individuality. 翻译if an integer is three times as large as the sum of the figures in its digit a/b is a fraction.If 2 is added to the numerator,the value of the fraction is 1/2.If 3 is added to the denominator,the fraction has a value of 1/3.The value of the sum a+b is