Cho a, b, c>0 và a, b, c khác 1. Mệnh đề nào sau đây sai?

A.  log c a b = log c a - log c b

B.  log c 2 a = 1 2 log c a

C. log a b = log c b log c a

D.  log c 2 a b 2 = 1 2 log c a - 1 2 log c b

điểm A ko phải là trung điểm của OB vì

A nằm giữa OB ( O và B cung nằm trên 2 tia đối góc A

nhưng OA \(\ne\) AB (3cm > 2 cm)

nên A ko phải là trung điểm OB

2 

Trong không gian Oxyz, cho ba véctơ  a → = ( - 1 ;   10 )  , b → =(1; 1;0), c → =(1; 1; 1). Trong các mệnh đề sau, mệnh đề nào sai?

A.  b → ⊥ c →

B.  c → = 3

C.  a → = 3

D.  b → ⊥ a →

Bài 1: Complete the following conversations about your neighbourhood. Then practise the conversations with a friend

1. Stranger: Excuse me, is there a post office near here?

You: yes,there is/ no there isn't.

2. Visitor: Excuse me, where is the bus stop?

You: the bus stop is on the + place (địa điểm)

3. Visitor: Excuse me, I need some medicine. Is there a chemist's near here?

You:yes, there is / no there isn't

4. Visitor: Excuse me, where is the bakery?

You: the bakery is on the + place (địa điểm)

5. Visitor: Excuse me, I'm lost. Where is the hospital?

You: the hospital is on the +place (địa điểm)

I. Find other acronyms in bold. (1m)

4. A. writes B. makes C. takes D. drives

VI. Finish the second sentence in such a way that is similar to the original one. (1,5m)

2. Does Thu's school have forty classrooms?

=> Are there forty classroom in thu's school?

5. Please tell me some things about your neighborhood,please?

=> Can you tell me some things about your neighborhood, please?

6. It is not good for you to stay up too late .

=> You shouldn't stay up too late.

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lam doesn't have english on tuesday and monday

chúc bạn học tốt nhé