Giải giúp mk với mk sắp thi rồi
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![](https://rs.olm.vn/images/avt/0.png?1311)
Hai bài đâu là bài nghe nên bỏ qua nhé
III
1 A
2 B
3 C
4 C
5 C
6 D
7 B
8 B
9 C
10 C
11 B
12 B
13 D
14 D
15 C
16 B
17 A
18 D
19 A
20 B
21 C
IV
1 Will teacher be replaced by robots in the future?
2 Nam said he wanted to be a robot designer
3 May said she hoped she would be in a city out at the sea
4 Linda said she overslept that morning
5 Anti-ageing pills will be invented to help people live longer
6 The contaminated results in people's health
7 If the factory doesn't treat its waste well, there will be serious water pollution
8 Five houses in a village in the easstern region were buried by the mudslide
9 Peter asked Mary if she wanted to travel to space one day
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) ĐKXĐ:
x³ - 1 khác 0
x khác 1
b) A = (5x² + 5x + 5)/(x³ - 1)
= 5(x² + x + 1)/[(x - 1)(x² + x + 1)]
= 5/(x - 1)
Thay x = 7 vào A, ta được:
A = 5/(7 - 1)
= 5/6
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(4x\sqrt[3]{\frac{1}{x}}+\frac{1}{x}.\sqrt[3]{x}=5\)
\(\Leftrightarrow4.\sqrt[3]{x^2}+\frac{1}{\sqrt[3]{x^2}}=5\)
Đặt \(\sqrt[3]{x^2}=a\)
\(\Rightarrow4a+\frac{1}{a}=5\)
\(\Leftrightarrow4a^2-5a+1=0\)
Làm tiếp đi nhé