TWO RESULTS ABOUT THE RATIONAL NUMBERSPRUNESCU, MIHAIRevue Roumaine de Mathematiques Pures et Appliquees
(英汉词典rational number:有理数) 相关知识点: 试题来源: 解析 解:∵|x|y+x2=0,∴|x|y+|x|2=0,∴|x|(y+|x|)=0,∴|x|=0或y+|x|=0,解得,x=0,或|x|=-y;①当x=0时,由y|x|+y=3,得y×0+y=3,解得,y=3;②当|x|=-y时,由y|x|+y=3,得-y2+y=3,即y2-y+3=...
百度试题 结果1 题目If two rational numbers x,y satisfy and then x =___。 (英汉词典 rational number:有理数) 相关知识点: 试题来源: 解析 0; 反馈 收藏
【题目】If two rational numbers x,ysatisfy|x|+y=3and|x|y+x^2=0, thenx=(),3(英汉词典rational n
Recommended Lessons and Courses for You Related Lessons Related Courses The Order of Real Numbers: Inequalities Quadratic Inequality | Solution Sets & Examples Writing Equations with Inequalities: Open Sentences and True/False Statements Solving Rational Inequalities | Steps & Examples ...
∴|x|（y+|x|）=0，∴|x|=0或y+|x|=0，解得，x=0，或|x|=-y；①当x=0时，由y|x|+y=3，得y×0+y=3，解得，y=3；②当|x|=-y时，由y|x|+y=3，得-y2+y=3，即y2-y+3=0，∵△=1-12=-11＜0，故该方程无解．综合①②知，x=0，y=3；故答案为：0、3．
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As mentioned above, the two-step process provides shorter gelation times as the one-step process. But the two-step process, as described in [14] includes several time consuming steps, like special purification of the reagents and distillation of the alcohol. The distillation of alcohol can be ...
题目 3 If the sum of two rational numbers is negative,then these two numbers must (). (A)be both negative numbers (B) be a positive number and a negative number (C)include at least one negative number(D) none of the above is correct 相关知识点: 试题来源: ...