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22 tháng 7 2023
a: =5^3(5^3+1)=125*126=15750
b: =10^3(10^2-10+1)=1000*91=91000
c: =15^n(15^2+1)=226*15^n
TT
1
VL
0
7 tháng 7 2021
1) ĐKXĐ: \(x\ge0\)
2) ĐKXĐ: \(\left\{{}\begin{matrix}x\ge0\\x\ne9\end{matrix}\right.\)
3) ĐKXĐ: \(x\ge4\)
4) ĐKXĐ: \(x>16\)
5) ĐKXĐ: \(\left[{}\begin{matrix}x\le-2\\x\ge0\end{matrix}\right.\)
6) ĐKXĐ: \(\left[{}\begin{matrix}x\le-1\\x\ge4\end{matrix}\right.\)
7) ĐKXĐ: \(\left[{}\begin{matrix}1\le x\\x< 3\end{matrix}\right.\)
7 tháng 7 2021
8) ĐKXĐ: \(\left[{}\begin{matrix}x\le-2\\x>3\end{matrix}\right.\)
9) ĐKXĐ: \(x\in R\)
10) ĐKXĐ: \(x\in R\)
11) ĐKXĐ: \(x\in R\)
12) ĐKXĐ: \(x\in R\)
13) ĐKXĐ: \(x\in R\)
14) ĐKXĐ: \(x\in R\)
15) ĐKXĐ: \(x\in R\)
16) ĐKXĐ: \(x\ne-\dfrac{1}{2}\)
17) ĐKXĐ: \(x\ge7\)
18) ĐKXĐ: \(x\ge-5\)
Anh chị nào bt thì giúp em với ạ. Em đang cần gấp
MT
3
NT
1
NB
0
15 tháng 2 2022
Venus is the 2 nd planet in the Solar System , with the most similar mass and size to Earth . This planet has no life, the gravity of Venus is 8.87 m/s² . The average surface temperature is 735 K (462 °C) , so Venus is the hottest planet in the solar system . I just know that
DH
1
KY
21 tháng 8 2021
refer
1. “Open the door,” he said to them.
-He told them to open the door.
2. “Where are you going?” he asked her.
-He asked her where she was going
3. “Which way did they go?” he asked.
-He asked which way they had gone
4. “Bring it back if it doesn’t fit”, I said to her.
-I told her to Bring it back if it didnt fit
5. “Don’t try to open it now,” she said to us.
-She told us to not try to open it then
6. “Is it going to be a fine day today?” I asked her.
-I asked her if it was going to be a fine day that day
7. “He’s not at home”, she said.
-She said that he was not at home
8. “Is the bus station far away?” the girl asked.
-The girl wanted to know if the bus station was far away
9. “Don’t stay late Ann” Tom said.
-Tom told Ann not to stay late
10. “Please let me borrow your car,” he said to her.
-He asked het to let him borow her car
11. “Jean, have you seen my gloves?” Thomas asked.
-Thomas asked Jean if he had seen his gloves
12. Don’t leave the window open, Mary”, I said.
-I told Mary not to leave the window open
13. “I’ll have a cup of tea with you,” she said.
She said that she would have a cup of tea with me
14. “I’ll pay him if I can” she said.
-She said that she would pay him if she could
15. “What are you going to do next summer?” she asked.
- She asked us what we were you going to do the next summer