Vì a\(⋮\)15;a\(⋮\)25;a\(⋮\)35=>aϵBC(15;25;35)

mà a nhỏ nhất =>aϵBCNN(15;25;35)

ta có :

15=3.5

25=5²

35=5.7

=>BCNN(15;25;35)=3.5².7=525

Vậy a=525

a ⋮ 15; 25; 35

a ∈ BC(15; 25; 35)

15 = 3.5; 25 = 5^2; 35 = 5.7

BCNN(15; 25; 35) = 3.5^2.7 = 525

Vì a là số tự nhiên nhỏ nhất khác 0 nên a = 525

Vậy a = 525

nhầm chỗ rồi banj đây là tiếng anh mà

lần sau khắc phục.còn bây giờ thì giải giùm đi

a là 22 nhé

Bạn đăng lên Toán đi

Giải:

a chia 20 dư 4 và chia 48 dư 4 nên a bớt đi 4 đơn vị thì a chia hết cho cả 20 và 48 khi đó:

(a - 4) ∈ BC(20; 48)

20 = 2^2.5; 48 = 2^4.3

BCNN(20; 48) = 2^4.3.5 = 240

(a - 4) ∈ B(240) = (0; 240;...}

a ∈ {4; 236;...}

Vì a là số tự nhiên nhỏ nhất nên a = 4

Vậy a = 4

1.does phong is school have forty classrooms?are there forty classrooms in Phong's school?

2.phuong has a brother ,nam.phuong is Nam's sister

3.my father usually drives to work?my father usually goes to work by car

1. Are there forty classrooms in Phong's school ?
2. Phuong is Nam's sister
3.My father usually goes to work by car

1. My mother is cleaning the floor

→ The floor is being cleaned by my mom.

2. My father repaired the bicycle for me

→ My bicycle was repaired by my father.

3. He bought this watch in the shop last week

→ This watch was bought in the shop last week by him.

4. Our teacher often helps us with our homework

→ Our homework is often helped by our teacher.

5. Peter is building a sandcastles

→ A sandcastle is being built by Peter.

6. They often wash their hands before meals

→ Their hands are often washed before meals.

Chúc bạn học tốt

ko bít câu bị đọng là sAO

phân số đó là -9/5

1. Children look very (excite)excited while playing game during break time.

2. The (long)longest of the experiment is 20 minutes.

3. My aunt works as a (chemistry)chemist at a university.

câu 2 thì mình chưa chắc có đúng ko nữa

Give the correct form of the word given to complete the sentencesGive the correct form of the world given to complete the sentences.

1. Children look very (excite) excited while playing game during break time.

2. The (long) length of the experiment is 20 minutes.

3. My aunt works as a (chemistry) chemist at a university.