If n is a positive integer, is the value of b-a at least twice the value of 3n-2n?() (1)a=2n+1 and b=3n+1 (2)n=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(...
If a is a positive integer, and if the units' digit of a2 is 9 and the units' digit of (a+1)2 is 4, what is the units' digit of (a+2)2?() A.1 B.3 C.5 D.7 E.9 相关知识点: 试题来源: 解析 A [解析] 根据a2的个位数是9可推知a的个位数可能为3或7,又根据(a+...
If n is a positive integer, which of the following is a possible value of |56 - 5n|? 选项: A、7 B、9 C、12 D、15 E、20 答案: B 提问列表 提问: 请问徐小梅老师,这题为什么选B呢?我当时觉得没一个选项符合条件。 5n是5的倍数,所以个位为0或5。如果个位为0,则56-5n的个位=6-0=6;...
If a is a positive integer, and if the units digit of a 2 is 9 and the units digit of (a + l)2 is 4, what is the units digit of (a + 2)2?_出国考试答疑器_GMAT_试题_Problem Solving
英语翻译if n is a positive integer,then n(n+1)(n+2) isA even only when n is oddB evne only when n is evenC odd whenever n is oddD divisible by 3 only when n is oddE divisible by 4 whenever n is even
1If n is a positive integer,and if the units’digit of n2 is 6 and the units’digit of (n-1)2 is 9,the units’digit of (n+1)2 is . (英汉小词典 units’digit:个位数字) 2(5分)If n is a positive integer,and if the units’digit of n2 is 6 and the units’digit of (...
If n is a positive integer, then which of the following must be true about (n) and (n+1)? () A. n is odd and (n+1) is even. B. n is even and (n+1) is odd. C. The product of the two terms is odd. D. The sum of the two terms is even. E. The product of the...
Ifnis a positive integer, what is the remainder whenis divided by 5? 选项: A、1 B、2 C、3 D、4 答案: E 提问列表 提问: 这题我的想法是3的幂次方末尾数是3,9,7,1,然后3^8n+3就是末位为7再加2为9,因为除5看末位就可以,所以余4,但是如果除以其他的数比如3,7等怎么办呢?
If n is a positive integer,and if the units’digit of n2 is 6 and the units’digit of (n-1)2 is 9,the units’digit of (n+1)2 is ___. (英汉小词典 units’digit:个位数字)
If is a positive integer such that the units digit of is , what is the units digit of ? A.1 B.3 C.5 D.7 E.9 显示答案 登录后才可以添加做题笔记哦,还没有账号? 马上注册 KMF 解析 网友解析 题目数据 收起 【过往命中时间】2024年11月04日中国线上;2024年09月18日中国线上;202...