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helpp meeeee
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Những câu hỏi liên quan
8 tháng 11 2021
a) \(\left(3x-1\right)^6=\left(3x-1\right)^4\)
\(\Rightarrow\left[{}\begin{matrix}3x-1=0\\3x-1=1\\3x-1=-1\end{matrix}\right.\)\(\Rightarrow\left[{}\begin{matrix}x=\dfrac{1}{3}\\x=\dfrac{2}{3}\\x=0\end{matrix}\right.\)
b) Áp dụng t/c dtsbn:
\(\dfrac{a+b-c}{c}=\dfrac{a-b+c}{b}=\dfrac{-a+b+c}{a}=\dfrac{a+b+c}{a+b+c}=1\)
\(\Rightarrow\left\{{}\begin{matrix}a+b-c=c\\a-b+c=b\\-a+b+c=a\end{matrix}\right.\)\(\Rightarrow\left\{{}\begin{matrix}a+b=2c\\a+c=2b\\b+c=2a\end{matrix}\right.\)
\(\Rightarrow M=\dfrac{\left(a+b\right)\left(b+c\right)\left(c+a\right)}{abc}=\dfrac{2a.2b.2c}{abc}=8\)
Help meeeee
DT
Đỗ Thanh Hải
CTVVIP
24 tháng 9 2021
1 went
2 have never been
3 haven't seen
4 saw
5 have they been
6 got
7 have already done
25 tháng 9 2021
1. I went to the new Mexican restaurant yesterday.
2. I have never been there. Did you like it?
3. I have not seen Ann for a very long time.
4. Really? I saw her yesterday at the gym.
5. How long have they been married?
6. Only a year. They got married last June.
7. No, you don't have to. I have already done it.
help meeeee
DT
Đỗ Thanh Hải
CTVVIP
28 tháng 11 2021
1 I wear colorful clothes during Tet Holiday
2 I will say happy new year to my mother
3 She won't ask for lucky money
4 I won't sweep the floor
5 He won't take the things related to the house out of water
HN
28 tháng 11 2021
1. I wear colorful clothes during Tet Holiday.
2. I will to say happy new year.....đoạn này mk hơi bí
.
3. She won't ask for lucky money.
4. I won't sweep the floor.
5. He won't take the things related to the house out of water.
