I- Choose a word in each line that has different stress pattern

1. A. standard B.tourist C.disease D.service

2. A.experience B.atmosphere C. nutrition D.consider

3. A.population B.overcrowded C.economic d.community

4. A. narrow B.require C.enough D.affect

5. A.crimal B.average C.skycraper D.physician

Which sentence below has the same meaning with : " What a love waiting room ".

A. What is a lovely waiting room ?

B. It is a lovely waiting room.

C. The waiting room is mine

D. What a waiting lovely room is !

E. My waiting room is lovely.

A = 2¹+2²+2³+2⁴+...+2¹⁰⁰

A = (2¹+2²)+(2³+2⁴)+...+(2⁹⁹+2¹⁰⁰)

A = 2(1+2) + 2³(1+2) +....+ 2⁹⁹.(1+2)

A = 2.3 + 2³.3 +....+ 2⁹⁹.3

A = 3.(2+2³+...+2⁹⁹) chia hết cho 3

=> A chia hết cho 3 (đpcm)

A = 2¹+2²+2³+2⁴+...+2¹⁰⁰

A = (2¹+2²+2³+2⁴)+(2⁵+2⁶+2⁷+2⁸)+...+(2⁹⁷+2⁹⁸+2⁹⁹+2¹⁰⁰)

A = 2(1+2+2²+2³)+2⁵(1+2+2²+2³)+...+2⁹⁷(1+2+2²+2³)

A = 2.15 + 2⁵.15 +....+ 2⁹⁷.15

A = 15.(2+2⁵+...+2⁹⁷) chia hết cho 5 (vì 15 chia hết cho 5)

=> A chia hết cho 5 (Đpcm)

Which sentence below has the same meaning with : " What a love waiting room ".

A. What is a lovely waiting room ?

B. It is a lovely waiting room.

C. The waiting room is mine

D. What a waiting lovely room is !

E. My waiting room is lovely.

Which sentence below has the same meaning with : " What a love waiting room ".

A. What is a lovely waiting room ?

B. It is a lovely waiting room.

C. The waiting room is mine

D. What a waiting lovely room is !

E. My waiting room is lovely.

How much homework do your students have to do?