试题来源: 解析 B 正确答案:B解析:对于所有实数(real number)v,运算(operation)v*被定义为方程v*=v-v/3,若(v*)*=8,那么v等于多少?本题的正确答案是B。由题意可得:v*=v-v/3=2v/3→(v*)*=2/3×2/3×v=4v/9=8 → v=18反馈 收藏 ...
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The set of all real numbers x satisfying x^2 - |x+2| + x > 0 is 06:58 Set of all real values of x whixh satisfy x^(2)-3x+2>0 and x^(2)-3x-4<... 02:54 The set of values of 'a' for which the inequality x^(2)-(a+2)x-(a+3)<0... 07:14 The set of all...
The mean is (4+6+8+17+x)/5=(35+x)/5.There are three possibilities for the median: it is either 6,8, or x. Let's start with 6. (35+x)/5=6 has solution x=-5, and the sequence is -5,4,6,8,17, which does have median 6, so this is a valid solution.Now let the ...
【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,For all real numbers v, the operation v* is defined by the equation $$v*=v-\frac{v}{3}$$. If (v*)* = 8, then v =
)((n+1)(n!)(x^2))| &=limlimits _(n→ ∞ )|1(n+1)⋅ x| &=|0 ⋅ x| &=0 (split)According to the ratio test, the series converges when this limit is less than 1. Because 0<1 for all x, the series converges for all real numbers.反馈 收藏 ...
Answer to: Determine all real numbers x that satisfy the equation x^{3}+7=5\sqrt{x^{3}+1} By signing up, you'll get thousands of step-by-step...
What does all real numbers mean in domain? What is the domain and range of the relation y = 2(x-5)^{2} + 8? What is the domain and range of the relation {(2, 4),(4, 8),(8, 16)}? What is the range of the function f(x) = 6x + 5 for the domain...
Show that for all real numbers x, sinx-(e^(2x)-e^(-2x)u)/(2i) and cosx-(e^2e-e^(-2x))/2. 相关知识点: 试题来源: 解析 (e^(2i)-e^(-in))/(2i)-(cosx+isinx-(cosπ-isinx))/(2i)-(2isinx)/(2i)=sinx(e^(2i)-e^ii^n)/-(cosx+isinx+cosx-isinx)/2=(2cos...
For all real numbers a and b, the operation ⊕ is defined by a ⊕ b = 2a – b. What is the absolute value of the difference between (3 ⊕ 1) ⊕ 2 and 6 ⊕ 3?___ 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 暂无解析 以上解析由...