ai giuos với
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`B.I.`
`1.` a
`2.` c
`3.` d
`4.` a
`5.` D
`6.` C
`7.` B
`8.` A
`II.`
`1.` Shrine
`2.` impressed
`3.` traditional
`4.` for
`C.I.`
`1.` T
`2.` T
`3.` F
`4.` F
`II.`
`1.` Yes, Jeans the most popular kind of clothes almost everywhere, rich people and poor people wear them too.
`2.` Jeans the only kind of tradtional clothes in the United States.
`3.` Because everybody wants to be modern, young and independent.
`4.` (Tự trả lời)
`D.I.`
`1.` Many letters can be written to my pen pal in english by me.
`2.` has done
`3.` I wish today were a holiday.
`4.` I missed the bus, so I came to the meeting late.
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1 new friends
2 time
3 forms
4 20
5 Half
6 stress
B
1 F
2 T
3 T
4 T
5 T
6 ?
cảm ơn bạn nhìu ạ , nhug trog bài đọc có not given nữa á bạn câu b á
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Câu 2:
Cho $x=0$ thì: $f(y)=f(0)+y$ với mọi $y\in\mathbb{R}$
Thay vô điều kiện số 2:
$f(0)+\frac{1}{y}=\frac{f(0)+y}{y^2}, \forall y\neq 0$
$\Rightarrow f(0)y^2+y=f(0)+y, \forall y\neq 0$
$\Leftrightarrow f(0)y^2=f(0), \forall y\neq 0$
$\Rightarrow f(0)=0$
Khi đó: $f(y)=f(0)+y=y, \forall y\in\mathbb{R}$
![](https://rs.olm.vn/images/avt/0.png?1311)
TL:
S / S / Đ / Đ / S
_HT_
s
đ
đ
đ
s
~HT~