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11th Grade

11 Qs

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Assessment

Quiz

Mathematics

11th Grade

Medium

Created by

Tín Trung

Used 1+ times

FREE Resource

11 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tam thức bậc hai f(x)=2x2+2x+5f\left(x\right)=2x^2+2x+5 nhận giá trị dương khi và chỉ khi

 x(0,+)x\in\left(0,+\infty\right)  

 x(2,+)x\in\left(-2,+\infty\right)  

 xRx\in R  

 x(,2)x\in\left(-\infty,2\right)  

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tam thức bậc hai  f(x)=x2+5x6f\left(x\right)=-x^2+5x-6  nhận giá trị dương khi và chỉ khi

 x(,2)x\in\left(-\infty,2\right)  

 x(3,+)x\in\left(3,+\infty\right)  

 x(2,+)x\in\left(2,+\infty\right)  

 x(2,3)x\in\left(2,3\right)  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tìm tập nghiệm của bất phương trình   x2+6x+70-x^2+6x+7\ge0 

 (,1][7,+)\left(-\infty,-1\right]\cup\left[7,+\infty\right)  

 (,7][1,+)\left(-\infty,-7\right]\cup\left[1,+\infty\right)  

 [1,7]\left[-1,7\right]  

 [7,1]\left[-7,1\right]  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tập nghiệm của bất phương trình  5x2+7x20-5x^2+7x-2\le0  

 [2;5]\left[2;5\right]  

 [25;1]\left[\frac{2}{5};1\right]  

 (;25][1;+)\left(-\infty;\frac{2}{5}\right]\cup\left[1;+\infty\right)  

 (;2][5;+)\left(-\infty;2\right]\cup\left[5;+\infty\right)  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tập nghiệm của bất phương trình  x29<0x^2-9<0  

 (3;3)\left(-3;3\right)  

 (;3)\left(-\infty;3\right)  

 (;3)\left(-\infty;3\right)  

 (;3)(3;+)\left(-\infty;-3\right)\cup\left(3;+\infty\right)  

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

0

1

2

3

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

1

2

0

vô số

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