2021年4月24日(土)オンライン授業①

2021年4月24日(土)オンライン授業①

11th - 12th Grade

5 Qs

quiz-placeholder

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2021年4月24日(土)オンライン授業①

2021年4月24日(土)オンライン授業①

Assessment

Quiz

Mathematics

11th - 12th Grade

Practice Problem

Hard

Created by

渡辺 崇

Used 2+ times

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5 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 6x2+7x56x^2+7x-5  を因数分解せよ。

 (2x+1)(3x5)\left(2x+1\right)\left(3x-5\right)  

 (2x1)(3x+5)\left(2x-1\right)\left(3x+5\right)  

 (2x5)(3x+1)\left(2x-5\right)\left(3x+1\right)  

 (2x+5)(3x1)\left(2x+5\right)\left(3x-1\right)  

2.

FILL IN THE BLANK QUESTION

1 min • 1 pt

 A=x2+3x2A=x^2+3x-2   B=3x2+2x+1B=3x^2+2x+1  とする。 ABAB  を展開したとき, x2x^2  の係数を求めよ。

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

2次方程式 3x24x2=0\sqrt{3}x^2-4x-2=0  を解け。

 x=1+3 , 333x=1+\sqrt{3}\ ,\frac{\ \sqrt{3}-3}{3}  

 x=3+33 , 333x=\frac{\sqrt{3}+3}{3}\ ,\ \frac{\sqrt{3}-3}{3}  

 x=3+33 , 333x=\frac{3+\sqrt{3}}{3}\ ,\ \frac{3-\sqrt{3}}{3}  

 x=13 , 3+33x=1-\sqrt{3}\ ,\ \frac{3+\sqrt{3}}{3}  

4.

FILL IN THE BLANK QUESTION

1 min • 1 pt

 10+22110+2\sqrt{21}  の整数部分を求めよ。

5.

FILL IN THE BLANK QUESTION

1 min • 1 pt

 nn  は自然数とする。 n2+45\sqrt{n^2+45}  が自然数となるような nn  の個数を求めよ。

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