apologise for forgetting to

Aunt Jane refused everyone to see her without a hat.

\(9954:42=237\)
 

\(A=\dfrac{1}{15}-\dfrac{1}{18}+\dfrac{1}{18}-\dfrac{1}{21}+...+\dfrac{1}{57}-\dfrac{1}{60}=\dfrac{1}{15}-\dfrac{1}{60}=\dfrac{1}{20}\)

1. If it rains, I will get wet.

2. If I am hungry, I will get something to eat.

3. If I don't see him, I will phone him.

4. If John has money, he will buy a house.

5. She will be cold if she doesn't wear a coat.

6. If it doesn't rain tomorrow, we will go fishing.

7. If you get a high score, I will give you a present.

8. If I have time, I will finish this test.

9. If she invites me to the party, I will go.

10. If you ask more politely, I will give you more food.

11. If you have a temperature, you will see the doctor.

12. If we take the bus, we won't be late.

a) 87

b) 88

Cho các số thực dương a, b, c thỏa mãn ab + bc + ca = abc. Chứng minh rằng \(\sqrt{\dfrac{a.\left(a+c\right)}{a+bc}}+\sqrt{\dfrac{b.\left(b+c\right)}{b+ac}}=\sqrt{a+b}\)

Cảm ơn anh nhe

Cho tập A gồm có 2020 số thực có tính chất: Với mọi a,b phân biệt thuộc A thì \(a^2+b\sqrt{2}\) là số hữu tỉ. Chứng minh rằng với mọi a thuộc A thì \(a\sqrt{2}\) là số hữu tỉ

1. TV is being watched

2. She will buy a new smart phone if she has enough money