选项 A,y = x²不是一一映射,例如当 y = 4 时,x = 2 或 x = -2,所以没有反函数。选项 B,y = |x|也不是一一映射,当 y = 2 时,x = 2 或 x = -2,没有反函数。选项 C,y = 2x 是一一映射,有反函数。选项 D,y = sinx 不是一一映射,一个 y 值对应多个 x 值,没有反函数。
百度试题 结果1 题目【题目】Given ; is an even function, which of the following must be true? T here may be more thanone correct answer. Circle all that are correct. 相关知识点: 试题来源: 解析 【解析】ABC 反馈 收藏
A. 情建但二林照压车向平据接备性管经队情建但二林照压车向平据接备性管经队A function that is not one-to-one.情建但二林照压车向平据接备性管经队情建但二林照压车向平据接备性管经队 B. 当名别包离被山来带素白些当名别包离被山来带素白些A function that passes the horizontal line test...
【题目】Given f is an even function, which of the following must be true? T here may be more thanone correct answer. Circle all that are correct.A. ∫_(-a)^af(x)dx=0B. ∫_-a)af(x)dx=2∫_0^a(f(x)dx)C. ∫_a^af(x)dx=0D. ∫_-a^a(f(x)dx=)∫_a^(-a)(f(x)...
If the function f(x) is an increasing function on the interval [a,b], then which of the following must be true? A. f(a) B. f(a)>f(b) C. f(a)=f(b) D. None of the above 相关知识点: 试题来源: 解析 A。因为函数在区间 [a,b] 上是增函数,所以当 a ...
百度试题 结果1 题目Which of the following functions represents an exponential function? ( ) A. f(x)=x^2 B. f(x)=7^x C. None of these choices are correct 相关知识点: 试题来源: 解析 B 反馈 收藏
Given f is an even function, which of the following must be true? There may be more than one correct answer. Circle all that are correct. ( ) A. ∫ _(-a)^af(x)=0 B. ∫ _(-a)^af(x)=2∫ _0^af(x) C. ∫ _a^af(x)=0 D. ∫ _(-a)^af(x)=∫ _a^(-a)f(x) ...
Let functionf be an even function and decreasing on the closed interval[1,2]. Which of the following functions are increasing on &−2,−1]?I.−f(x)II.f(−x)III.−f(−x)A:I,onlyB:IandII, onlyC:III,onlyD:II,only 相关知识点: 试题来源: 解析 D None 反馈 收藏 ...
___ is any function which can be defined by a rational fraction, an algebraic fraction such that both the numerator and the denominator are polynomials. 相关知识点: 试题来源: 解析 Hence, it is a partial fraction. Partial fraction is any function which can be defined by a rational fraction,...
'Affect' vs. 'Effect' Using Bullet Points ( • ) Why is '-ed' sometimes pronounced at the end of a word? What's the difference between 'fascism' and 'socialism'? More Commonly Misspelled Words Popular in Wordplay See All Top 12 Sophisticated Compliments ...