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Cho x = 2 => y = 1
=> A(2;1) thuộc đồ thị hàm số y = 1/2 x
(do a nguyên)
(bạn tự làm tiếp nhé)
I. Complete the dialogues
1. T: Hi! My ……….. Minh. What’s …………name?
S1: Hello! My name’s (Lan). …………. to meet you.
T: Nice to ………… you, too. Where are you………….?
S1: ………….from Vietnam.
T: How ……….are you?
S1: I’m ten…………...
T: What animals ……….you ?
S1: I ……….monkeys.
T: Why do you …………monkeys?
S1: Because they ………….swing.
2. A: Hi. …………name’s Thu.
B: Hello. I’m Linda. Nice ………meet you.
A: Nice to meet you,……….. . …………….are you from?
B: I’m ………….London.
A: So, you’re…………….. I’m Vietnamese.
3. S1: Hi! ……….name’s Alan.
S2: Hello! I’m Peter. Nice to meet………….
S1: Nice to meet you, …… . Where are you…………?
S2: I’m from…………….. I’m American.
4. A: Look. This …….my new pen friend.
B: What’s his…………?
A: ………… name is Alan.
B: Where is ………. from?
A: He is from Singapore. He’s ……………….
II. Complete the sentence
1. Her name’s Mai. She’s from …… ……….. She’s …… …….
2. ……….name’s Alan. He’s from …………… He’s ……… .
3. His name’s Peter. He’s …………America. He’s ……………..
4. She’s Linda. She’s …………England. She’s ………………..
5. Thu is …………. Haiphong. She’s ……….……….
6. Hi. My name’s Linda. ……..from London. I’m………………..
7. He lives ………..58 White Road, London, England.
8. He s watching TV and ………….sports
9. His ……….. Tony.
10. He’s ………….London. He’s …………….
III. Read and answer the question (Đọc và trả lời câu hỏi):
Dear Linda.
My name’s Nga. I’m Vietnamese. I live in Viet Tri, Phu Tho, Vietnam. I’m eleven years old. I study at Hunglo Primary School. My favourite subject is English. I reading book.
Love,
Nga
1. What’s her name?
2. How old is she?
3. Where is she from?
4. What is her school’s name?
5. What’s her favourite subject?
Ta có : |y - 2017|\(\ge0\forall y\in R\)
Nên A = |y - 2017| + 2018 \(\ge0+2018\forall y\in R\)
<=> A = |y - 2017| + 2018 \(\ge2018\forall y\in R\)
Vậy Amin = 2018 khi |y - 2017| = 0 <=> y - 2017 = 0 <=> y = 2017
GTNN=2018
ta thay vay nha
|y-2017| phải có giá trị nhỏ nhất mà ta biết giá trị nhỏ nhất của nó là =0
do |y-2017|+2018=0+2018=2018
cau duoi =2