1 A

2 A

3 A

4 đúng

5 D

6 C

7 A

8 A

9 B

10 D

Em chụp rộng ra , đề bài thiếu

TH1: x<3

=>x-3<0

=>x-3-1<-1

=>x-4<-1

x-3<0

=>|x-3|>0

=>\(\left|x-3\right|^{16}>0\left(1\right)\)

x-4<-1

=>|x-4|>1

=>\(\left|x-4\right|^{17}\) >1(2)

Từ (1),(2) suy ra \(\left|x-3\right|^{16}+\left|x-4\right|^{17}>1\)

=>x∈∅

TH2: x>4

=>x-4>0; x-4+1>1

=>x-4>0; x-3>1

=>\(\left|x-4\right|^{17}>0;\left|x-3\right|^{16}>1\)

=>\(\left|x-3\right|^{16}+\left|x-4\right|^{17}>1\)

=>x∈∅

TH3: 3<=x<=4

=>x-3>=0; x-4<=0

=>|x-3|=x-3; |x-4|=4-x

\(\left|x-3\right|^{16}\le x-3;\left|x-4\right|^{17}\le4-x\)

=>\(\left|x-3\right|^{16}+\left|x-4\right|^{17}\le x-3+4-x=1\)

Dấu '=' xảy ra khi x-3=0 hoặc x-4=0

=>x=3 hoặc x=4

1 The meeting was canceled 3 days ago

2 She told me she was watching a film with her sister then

3 I admire the guitarist who is perfroming on the stage

4 Had it not been for Pauline's interest, the project would have been abandoned 

IV. 

1. The meeting was canceled 3 days ago.

2. She told me shewas watching a film with her sister then

3. I admire the guitarist who is performing on the stage

4. Had it not been for Pauline's interest, the project was abandoned. (chắc thế)

III. 

A. 

1. B

2. C

3. B

4. A

5. D

B. 

1. C

2. B

3. B

4. A

5. C

1 b c b a d

2 c b b a c nha

1+5+3+9+5+7=30

Bằng 30 nha

k Đúng cho mình nhá

103,130,202,220,301,310,400

103,130,112,121,202,220,211,301,310,400

a: Ta có: BE⊥ Ax

CF⊥Ax

Do đó: BE//CF

b: Xét ΔMEB vuông tại E và ΔMFC vuông tại F có

MB=MC

\(\hat{EMB}=\hat{FMC}\) (hai góc đối đỉnh)

Do đó: ΔMEB=ΔMFC

c: ΔMEB=ΔMFC

=>BE=CF