A=3a+2 tại a=\(\frac43\)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
A = \(x^5\) - 5
A(1) = 1\(^5\) - 5
A(1) = 1 - 5
A(1) = - 4
3 x 25,33 - 1388,44 : 8
= 75,99 - 173,555
= - 97,565
\(\frac{2x}{3y}\) = - \(\frac13\)
\(\frac{2x}{-1}=\) \(\frac{3y}{3}\)
Áp dụng tính chất dãy tỉ số bằng nhau:
\(\frac{2x}{-1}=\) \(\frac{3y}{3}\) = \(\frac{2x+3y}{-1+3}=\) \(\frac72\)
\(x\) = \(\frac72\) : (-2)
\(x\) = - 7/4
y = 7/2
Vậy (x; y) = (-7/4; 7/2)
Cấu trúc: because + S + V
→ because of + N / V-ing / cụm danh từ
Ví dụ:
1. I made it from a piece of wood.
⇒ What did you make it from?
2. She bought it at the shop over there.
⇒ Where did she buy it?
3. It took her three hours to finish the composition.
⇒ How many times did it take her to finish the composition?
4. I need a phone card to phone my parents.
⇒ Why do you need a phone card?
5. It is about 1.500 km from Hue to Ho Chi Minh City.
⇒ How far is it from Hue to Ho Chi Minh City?
6. The bank is opposite the restaurant.
⇒ What is the location of the bank?
7. The dress looked very nice.
⇒ How was the dress?
8. Her neighbor gave her a nice dress.
⇒ Who did the neighbor give a nice dress?
9. They returned to America two weeks ago.
⇒ When did they return to America?
10. He travelled to Nha Trang by coach
⇒ How did he travel to Nha Trang?
it was made from a piece of wood by me
+ bạn có thể bỏ "by me" nếu chủ đích không quan tâm người đã làm "nó"
+ bị động:
S+was/were+V3/ed+O
1.
(-): Children didn't plant more trees.
(?): Did children plant more trees?
`a=4/3`
`=>A=3a+2=3.(4/3)+2=4+2=6`
Thay \(a=\frac43\) vào A = 3a + 2, ta được:
A = \(3\cdot\frac43+2=4+2=6\)