Of the following, which is true for all real numbers a( ). A. √a2=a B. a2⩾a C. a2+1
选项 A 中,分母不能为 0,所以 x - 1 ≠ 0,即 x ≠ 1,定义域不是所有实数。选项 B 中,根号下的数须大于等于 0,即 x - 1 ≥ 0,x ≥ 1,定义域不是所有实数。选项 C 中,对于任何实数 x,x^2 都有意义,定义域为所有实数。选项 D 中,对数中的真数须大于 0,即 x - 1 > 0,x > 1,定义...
To determine which of the given numbers are irrational, we need to understand the definition of irrational numbers. An irrational number is a number that cannot be expressed as a fraction of two integers. This means that irrational numbers are non-ter
ashall by two,by you by,lunch order show key lie 由二将,由您,午餐顺序展示钥匙谎言[translate] a一个很大的朋友圈 A very big friend encircles[translate] aname all sets of numbers to which each real number belongs 正在翻译,请等待... [translate]...
If A, B, and C are real numbers, and if ABC= 1, which of the following conditions must be true? () A. AB is equal to 1C B. A, B, and C must all be positive C. Either A=1, B=1, or C=1 D. Either A=0, B=0, or C=0 E. Either A<1, B< 1, or C<1...
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...
If x and y are real numbers, which of the following CANNOT be inferred from the statement above? ( ) A. In order for x^2 to be equal to y^2, it is sufficient that x be equal to y. B. A necessary condition for x to be equal to y is that x^2 be equal to y^2. C...
If a, b, and c are real numbers, and a ≠ 0, which of the following must be true? A.a*(b+c)=a*b+a*c B.a*(b-c)=a*b-a*c C.b+ca=ba+cab+ca=ba+ca D.b−ca=ba−cab−ca=ba−ca E.ab+c=ba−acab+c=ba−ac ...
Which of the axioms of real numbers justifies the statement: 3⋅ (x+y)=3x+3y ( ) A. Commutative Rule of multiplication B. Commutative Rule of addition C. Associative Rule of multiplication D. Associative Rule of addition E. Distributive Rule F. Identity Element G. Closure Rule...
a调查科研不端行为并做出相应的惩罚 The investigation scientific research dishonorable behavior and makes the corresponding penalty [translate] aClearly, the "class of all real numbers which are much greater than 清楚地,大于所有实数的“类 [translate] ...