If a and b are any real numbers, then which of the following expressions is always positive? A) |a| B) |a + b| C) |a - b| + 1/2 D) a⏫ + b⏫ E) (a + b)⏫ 相关知识点: 试题来源: 解析CA选项:|a|的最小值为0(当a=0时),不总是正数,排除。 B...
704. Show that the set of real numbers r which satisfy the inequality ∑_(k=1)^(70)k/(x-k)≥5/4 is a union of disjoint intervals, the sum of whose lengths is 1988.(IRL)4.试证:满足不等式∑_(k=1)^(10)k/(x-k)≥5/4的实数x的集合是互不相交的区间的并集,且这些区间长度的和...
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Which numbers are constructible? why? a.1.23456b.5π2c.41/3d.81/12e.(2+17)3/8 Constructible Number Definition: In geometry and variable based math, a real number r is constructible iff, given a line portion of unit length, a line section of length |r| can be built with a compas...
Given these subsets of real numbers raised to nn, the goal is to determine which are subspaces. (a) All vectors (a1,...,an)(a1,...,an) such that a1=0a1=0. (b) All vectors (a1,...,an)(a1,...,an) such that a1=3a1=3. (c) All vectors (a1,...,an)(a1,...,an) ...
real number Any of the rational numbers (which include the integers) or irrational numbers. Real numbers exclude imaginary numbers, found in complex numbers of the general form a+ bi where i=$$ \sqrt { - 1 } $$.although these do include a real component a. 相关知识点: 试题来源: ...
Let S be the set of ordered triples (x,y,z) of real numbers for which log_(10)(x+y)=z and log_(10)(x^2+y^2)=z+1. There are real numbers a and b such that for all ordered triples (x,y,z) in S we have x^3+y^3=a⋅10^(3z)+b⋅10^(2z). What is the valu...
If a, b, and c are real numbers, which of the following must be true? 返回 123456789101112131415161718 If a, b, and c are real numbers, which of the following must be true? A.a+(b+c)=(a+b)+c B.a-(b-c)=(a-b)-c C.a*(b*c)=(a*b)*c...
Clearly, the "class of all real numbers which are much greater than问题补充:匿名 2013-05-23 12:21:38 显然,“一类的所有实数,这是远远大于 匿名 2013-05-23 12:23:18 显然,“一类的所有实际数字要大得多的比 匿名 2013-05-23 12:24:58 清楚地,大于所有实数的“类 匿名 2013-05-23...
Answer to: Tell which set or sets the number below belongs to: natural numbers, whole numbers, integers, rational numbers, irrational numbers, or...