Giúp mik vs ạ T^T
Giúp mik vs mn, gấp lắm ạ T^T
Câu 2:
\(a,\Leftrightarrow\Delta'=\left(1-m\right)^2-\left(m^2-m\right)>0\\ \Leftrightarrow m^2-2m+1-m^2+m>0\\ \Leftrightarrow1-m>0\Leftrightarrow m< 1\\ b,\text{Áp dụng Viét: }\left\{{}\begin{matrix}x_1+x_2=2\left(1-m\right)\\x_1x_2=m^2-m\end{matrix}\right.\\ \left(2x_1-1\right)\left(2x_2-1\right)-x_1x_2=1\\ \Leftrightarrow2x_1x_2-2\left(x_1+x_2\right)+1-x_1x_2=1\\ \Leftrightarrow x_1x_2-2\left(x_1+x_2\right)=0\\ \Leftrightarrow m^2-m-4\left(1-m\right)=0\\ \Leftrightarrow m^2+3m-4=0\\ \Leftrightarrow\left(m-1\right)\left(m+4\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}m=1\left(ktm\right)\\m=-4\left(tm\right)\end{matrix}\right.\)
Vậy m=-4
Câu 1:
\(1,\Leftrightarrow2x-2=3\Leftrightarrow x=\dfrac{5}{2}\\ 2,ĐK:x\ne\pm1\\ PT\Leftrightarrow\dfrac{2x^2+2x-1}{x^2-1}=2\\ \Leftrightarrow2x^2+2x-1=2x^2-2\\ \Leftrightarrow2x=-1\Leftrightarrow x=-\dfrac{1}{2}\left(tm\right)\\ 3,\Leftrightarrow\left[{}\begin{matrix}3x-2=2x-1\\3x-2=1-2x\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=1\\x=\dfrac{3}{5}\end{matrix}\right.\)
\(4,\Leftrightarrow\left[{}\begin{matrix}3x-1=2-x\left(x\ge\dfrac{1}{3}\right)\\3x-1=x-2\left(x< \dfrac{1}{3}\right)\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{3}{4}\left(tm\right)\\x=-\dfrac{1}{2}\left(tm\right)\end{matrix}\right.\\ 5,\Leftrightarrow4x^2-2x+10=9x^2-6x+1\left(x\le\dfrac{1}{3}\right)\\ \Leftrightarrow5x^2-4x-9=0\\ \Leftrightarrow\left[{}\begin{matrix}x=\dfrac{9}{5}\left(ktm\right)\\x=-1\left(tm\right)\end{matrix}\right.\)
\(6,\Leftrightarrow3x^2-9x+1=x^2-4x+4\left(x\ge2\right)\\ \Leftrightarrow2x^2-5x-3=0\\ \Leftrightarrow\left[{}\begin{matrix}x=3\left(tm\right)\\x=-\dfrac{1}{2}\left(ktm\right)\end{matrix}\right.\\ 7,\Leftrightarrow2x^2+3x-4=7x+2\left(x\ge-\dfrac{2}{7}\right)\\ \Leftrightarrow x^2-2x-3=0\\ \Leftrightarrow\left[{}\begin{matrix}x=3\left(tm\right)\\x=-1\left(ktm\right)\end{matrix}\right.\)
Các bạn giúp mik câu T F NG vs ạ
Mình xin cảm ơn !
A. yes no question
1. didn't you ask me any question
giải giúp mik vs ạ
Tom stayed at home yesterday.
=> Where .............
mrs Robinson bought a poster.
=> Who ........
How heavy are you?
=> What....
I don't like beef . My borther doesn't like beef.
I don't like beef and............
giúp mik vs mik đg gấp lắm ạ
1 where is tom stayed
2 who bought a poster
moik ko biết 2 câu cuối idol nào làm đi
Tom stayed at home yesterday.
=> Where did tom stay yesterday ?
mrs Robinson bought a poster.
=> Who bought this poster ?
How heavy are you?
=> What....
Câu này hỏi về cân nặng phải là much chứ nhỉ ?
How much is your weight ?
I don't like beef . My borther doesn't like beef.
I don't like beef and.my brother doesnt like either
Tom stayed at home yesterday.
=> Where was Tom yesterday?
mrs Robinson bought a poster.
=> Who did buy a poster?
How heavy are you?
what are the weight of you?
I don't like beef . My borther doesn't like beef.
I don't like beef and my brother doesn't,either.
Bài1. Cho 1 đoạn mạch đơn của phân tử ADN có trình tự sắp xếp các Như sau: -T-G-A-X-G-G-A-T-X- Hãy Viết đoạn mạch đơn bổ sung với nó? Giúp mik Vs ạ
A-T-G-X-T-A-G-T-X Hãy viết đoạn mạch đơn bổ sung với nó.
Đoạn mạch đơn bổ sung với nó là: T-A-X-G-A-T-X-A-G
3 Một đoạn mạch đơn cùa phân tủ ADN có trình tự sắp xếp như sau:
A-T-G-X-T-A-G-T-X Hãy viết đoạn mạch đơn bổ sung với nó.
Đoạn mạch đơn bổ sung với nó là: T-A-X-G-A-T-X-A-G
This channel is not as interesting as that one
This channel.......
Tom works hard for the exam. Ana works hard for the exam, too
Tom.....
The students stayed home yesterday.
The students didn't.....
Giúp mik nhanh vs ạ mik đag cần gấp
giúp mik với ạ mik cần gấp. GIẢI CỤ THỂ GIÚP MIK vs ạ
`@` `\text {Ans}`
`\downarrow`
`4,`
Vì `\text {MN // BC}`
`=>` $\widehat {B} = \widehat {BMN} = 114^0 (\text {2 góc đối đỉnh})$
Ta có: \(\left\{{}\begin{matrix}\widehat{\text{BMN}}+\widehat{\text{AMN}}=180^0\left(\text{2 góc kề bù}\right)\\\widehat{\text{CNM}}+\widehat{\text{ANM}}=180^0\left(\text{2 góc kề bù}\right)\end{matrix}\right.\)
`=>`\(\left\{{}\begin{matrix}\widehat{\text{AMN}}=180^0-114^0=66^0\\\widehat{\text{ANM}}=180^0-130^0=50^0\end{matrix}\right.\)
Xét `\Delta AMN`:
\(\widehat{\text{A}}+\widehat{\text{M}}+\widehat{\text{N}}=180^0\left(\text{định lý tổng 3 góc trong 1 tgiac}\right)\)
`=>`\(\widehat{\text{A}}+66^0+50^0=180^0\)
`=>`\(\widehat{\text{A}}=180^0-66^0-50^0=64^0\)
Mà \(\widehat{\text{A}}=\widehat{\text{x}}\)
`=>`\(\widehat{\text{x}}=64^0\)
Vậy, số đo của góc `x = 64^0.`
giúp mik vs chỗ nào sai sửa giúp mik vs ạ ;-;
Đề bài:Viết tóm tắt lại truyện ngắn''Tôi đi học''
MN GIÚP MIK VS Ạ,MIK ĐAG CẦN GẤP Ạ!