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

giúp mk link /hoi-dap/question/123504.html với kick cho Đường Hạc Bảo Quyên