giản dị

chúc bạn học tốt!

giản dị, tốt bụng, bao dung, dũng cảm.

#Hoc tot.

1. I am pleased that you and your family are well.

2. What time do you usually have lunch?

3. He often listens to music in his free time.

4. My classes start at seven o'clock.

5. I go to school by bike.

i am pleased that you and your familyare well 

what time do you usually have lunch 

he often listens to music in his free time

my classes start at seven o'clock

i go to school by bike

hihi mik lm r :> chuc hc tot

Một tam giác cân có góc ở đáy bằng 35⁰ 

thì góc ở đỉnh có số đo là \(110^0\)

Học tốt

Góc ở đỉnh là : \(180^0-35^0\cdot2=110^0\)

1. People took the victim to the hospital after the accident.
________The victim was taken to the hospital after the accident______________________.
2. The police didn’t find my lost suitcase.
________My lost suitcase wasn't found by the police_______________________________.
3. Someone broke into Mr. Smith’s house when they were out.
________Mr. Smith’s house was broken into when they were out._____________________.

4. Soldiers, common people and criminals built the Great Wall of China.
________The Great Wall of China was built by soldiers, common people and criminals______.
5. They cut that piece of paper into 4 smaller pieces.
________That piece of paper was cut into 4 smaller pieces.___________________________.

11. My father taught me Japanese during last summer.
________I was taught Japanese by my father during last summer ____________.
12. Did the local people build this wooden bridge .

________Was this wooden bridge built by the local people__________________.
13. Did anyone harvested all the apples in the garden yesterday.
________Were all the apples in the garden harvested yesterday ?____________.
14. What did people make wine from?
________What was wine made from?__________________________________.
15. When did they close the shop yesterday?
________When was the shop closed yesterday?_________________________.

HD : em dùng t/c tổng hiệu tim AB ; AC ( AB - số lớn vì AB-AC=2cm còn AC là số bé)

sau đó ; em hãy dùng đ/lý pytago tính BC 

Chức em học tốt

- Đặt \(A=1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{64}\)

- Ta có: \(A=1+\frac{1}{2}+\left(\frac{1}{3}+\frac{1}{4}\right)+\left(\frac{1}{5}+\frac{1}{6}+\frac{1}{7}+\frac{1}{8}\right)+...+\left(\frac{1}{33}+\frac{1}{34}+...+\frac{1}{64}\right)\)

       \(\Rightarrow A>1+\frac{1}{2}+\left(\frac{1}{4}+\frac{1}{4}\right)+\left(\frac{1}{8}+\frac{1}{8}+\frac{1}{8}+\frac{1}{8}\right)+...+\left(\frac{1}{64}+\frac{1}{64}+...+\frac{1}{64}\right)\)

      \(\Leftrightarrow A>1+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}\)

      \(\Leftrightarrow A>4\)\(\left(ĐPCM\right)\)

a) f(-3) = 2.(-3) - 3 = -9

f(0,5) = 2.0,5 - 3 = -2

f(0) = 2.0-3 = -3

b) f(x) = 7 hay 2x - 3 = 7

<=> 2x = 10

<=> x = 5

a) f(-3) = 2.(-3) - 3 = -6 - 3 = -9

f(0,5) = 2.0,5 - 3 = 1 - 3 = -2

f(0) = 2.0 - 3 = 0 - 3 = -3

b) f(x) = 2x - 3 = 7

2x = 10

x = 5