的个位数为8,2012!!的个位数为0,2010!!的个位数为4,2008!!的个位数为6,……,2!!的个位数为4,而2022-2=2020,20202020÷4=505,余数为0,说明有505个周期,且每个周期的个位数之和为8+0+4+6=18,所以2022!!+2020!!+2018!!+...+4!!+2!!的个位数为8×505=4040,个位数为0,所以2022!!+2020!!
百度试题 结果1 题目Given that n is a positive integer, then 10" is ( ).(A) the product of ten ns(B) an n-digit integer(C) a(n+1)-digit integer(D) a(n-2)-digit integer 相关知识点: 试题来源: 解析 C 反馈 收藏
What is the least possible positive integer-value of n such that the square root of 18 x n x 34 is an integer? If integers x and y satisfy 2008x = 16y , find the smallest possible value of x + y. What is the smallest rational number between 0 and 1? Let f(x) = cos x. Fi...
aThere are multiple test cases. Each case contains a positive integer N, followed by N positive numbers. All the numbers in the input are less than 100. A test case with N = 0 denotes the end of input. This test case is not to be processed. There are multiple test cases. Each case...
If n is a positive integer then (1+x)^n=^nC0 x^0+^nC1 x^1+^nC2^2+………+^nCrx^r= sum (r=0)^n ^nCrx^r and (1-x)^n= ^nC0x^0-^nC1 x^1 +^nC2-^nC3x^3+………+(-1)^n ^nCnx
Problem 17If n is an even positive integer, the double factorial notation nl! represents the product of all the even integers from 2 to n. For example, 8!! =2.4. 6.8. What is the units digit of the following sum?2!!+4!!+6!!++2018!!+2020!!+2022!!如果n是一个正整数,那么双阶乘...
What is the remainder when the positive integer x is divided by 2 ?() (1)x is an odd integer. (2)x is a multiple of 3. A.条件(1)充分,但条件(2)不充分. B.条件(2)充分,但条件(1)不充分. C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分. D.条件(1)充分,条件...
【GRE真题答案解析】GRE考满分为考生准备GRE 数学QR真题答案解析,n is an odd positive integer, n*($$2^{m}$$)=160 Quantity A: n Quantity B: m
Answer:According to the given condition,we have (n-1)(n+1)-r = 24m,where m is an integer,and therefore,r = n²-1-24m.1.Let m=0,n=3,we have r=8.Note that 2 is not a factor of n when n=3.2.Let m=0,n... APP内打开 结果2 举报 1楼的答案,随便找一个符合条件的数就知...
[Data Sufficiency] 试题详情 题目: If n and k are positive integers, is n/k an even integer? (1) n is divisible by 8. (2) k is divisible by 4. 选项: 答案: E 提问列表 提问: 请教老师一道数学题 解答: 注册太麻烦?点这里查看免费答疑吧!