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2.2 一元不等式

Authored by HOI WONG

Mathematics

9th Grade

Used 10+ times

2.2 一元不等式
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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 Q1 解(x−1)(2x−1)>0。Q1\ 解(x-1)(2x-1)>0。  

 x>1 或x<12x>1\ 或x<\frac{1}{2}  

 x>−1 或x<12x>-1\ 或x<\frac{1}{2}  

 x>1 或x<−12x>1\ 或x<\frac{-1}{2}  

 x>1 或x<2x>1\ 或x<2  

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 Q2 解(x+2)(x−3)≤6。Q2\ 解(x+2)(x-3)\le6。  

 −3≤x≤4-3\le x\le4  

 3≤x≤43\le x\le4  

 −3≤x≤−4-3\le x\le-4  

 3≤x<43\le x<4  

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 Q3 解3x2−7x+2≤0。Q3\ 解3x^2-7x+2\le0。  

 −13≤x≤2\frac{-1}{3}\le x\le2  

 −13≤x≤−2\frac{-1}{3}\le x\le-2  

 1≤x≤21\le x\le2  

 13≤x≤2\frac{1}{3}\le x\le2  

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 Q4 解x2−6x+7≥0。(答案以根號「」表示。)Q4\ 解x^2-6x+7\ge0。(答案以根號「\sqrt{ }」表示。)  

 無解無解  

  x≤3−2\ x\le3-\sqrt{2}  

 x≥3+2 或 x≤3−2x\ge3+\sqrt{2}\ 或\ x\le3-\sqrt{2}  

 x≥3+2 x\ge3+\sqrt{2}\   

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 Q5  解x2+10x+18<0。(答案以根號「」表示。)Q5\ \ 解x^2+10x+18<0。(答案以根號「\sqrt{ }」表示。)  

 無解無解  

 x>−5−7x>-5-\sqrt{7}  

 x<−5+7x<-5+\sqrt{7}  

 −5−7<x<−5+7-5-\sqrt{7}<x<-5+\sqrt{7}  

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 Q6  解4x−x2<−5Q6\ \ 解4x-x^2<-5  

 x<−1x<-1  

 x>5x>5  

 x<−1或 x>−5x<-1或\ x>-5  

 x<−1或 x>5x<-1或\ x>5  

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 Q7  解 x2−4≥0Q7\ \ 解\ x^2-4\ge0  

 x≤−2x\le-2  

 x≥2x\ge2  

 x≤−2 或 x≥2x\le-2\ 或\ x\ge2  

 −2≤x≤2-2\le x\le2  

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