Chương III - Hệ hai phương trình bậc nhất hai ẩn
Các câu hỏi tương tự
Giải các hệ PT sau:
a) left{{}begin{matrix}2x^2-3xyy^2-3x-12y^2-3xyx^2-3y-1end{matrix}right.
b) left{{}begin{matrix}x^3-2y4y^3-2x4end{matrix}right.
c) left{{}begin{matrix}sqrt{x+1}-sqrt{7-y}4sqrt{y+1}-sqrt{7-x}4end{matrix}right.
d) left{{}begin{matrix}2x^2y+frac{1}{y}2y^2x+frac{1}{x}end{matrix}right.
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Giải các hệ PT sau:
a) \(\left\{{}\begin{matrix}2x^2-3xy=y^2-3x-1\\2y^2-3xy=x^2-3y-1\end{matrix}\right.\)
b) \(\left\{{}\begin{matrix}x^3-2y=4\\y^3-2x=4\end{matrix}\right.\)
c) \(\left\{{}\begin{matrix}\sqrt{x+1}-\sqrt{7-y}=4\\\sqrt{y+1}-\sqrt{7-x}=4\end{matrix}\right.\)
d) \(\left\{{}\begin{matrix}2x^2=y+\frac{1}{y}\\2y^2=x+\frac{1}{x}\end{matrix}\right.\)
giải hpt bằng phương pháp thế:9) left{{}begin{matrix}3x-2y2x+3y6end{matrix}right.10) left{{}begin{matrix}2x+3y24x-y-10end{matrix}right.11) left{{}begin{matrix}3x-2y32x-dfrac{4}{3}y1end{matrix}right.12) left{{}begin{matrix}5x+y32x+0,4y1,2end{matrix}right.giúp mk vs ạ mai mk học rồi
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giải hpt bằng phương pháp thế:
9) \(\left\{{}\begin{matrix}3x-2=y\\2x+3y=6\end{matrix}\right.\)
10) \(\left\{{}\begin{matrix}2x+3y=2\\4x-y-1=0\end{matrix}\right.\)
11) \(\left\{{}\begin{matrix}3x-2y=3\\2x-\dfrac{4}{3}y=1\end{matrix}\right.\)
12) \(\left\{{}\begin{matrix}5x+y=3\\2x+0,4y=1,2\end{matrix}\right.\)
giúp mk vs ạ mai mk học rồi
Giải hệ phương trình:
1, left{{}begin{matrix}x^2+1+y^2+xyyx+y-2frac{y}{1+x^2}end{matrix}right.
2, left{{}begin{matrix}x^3+8y^3-4xy^212x^4+8y^4-2x-y0end{matrix}right.
3, left{{}begin{matrix}x^2+y^2frac{1}{5}4x^2+3x-frac{57}{25}-yleft(3x+1right)end{matrix}right.
4, left{{}begin{matrix}sqrt{12-y}+sqrt{yleft(12-xright)}12x^3-8x-12sqrt{y-2}end{matrix}right.
5, left{{}begin{matrix}left(1-yright)sqrt{x-y}+x2+left(x-y-1right)sqrt{y}2y^2-3x+6y+12sqrt{x-2y}-sqrt{4x-5y-3}end{matrix}right.
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Giải hệ phương trình:
1, \(\left\{{}\begin{matrix}x^2+1+y^2+xy=y\\x+y-2=\frac{y}{1+x^2}\end{matrix}\right.\)
2, \(\left\{{}\begin{matrix}x^3+8y^3-4xy^2=1\\2x^4+8y^4-2x-y=0\end{matrix}\right.\)
3, \(\left\{{}\begin{matrix}x^2+y^2=\frac{1}{5}\\4x^2+3x-\frac{57}{25}=-y\left(3x+1\right)\end{matrix}\right.\)
4, \(\left\{{}\begin{matrix}\sqrt{12-y}+\sqrt{y\left(12-x\right)}=12\\x^3-8x-1=2\sqrt{y-2}\end{matrix}\right.\)
5, \(\left\{{}\begin{matrix}\left(1-y\right)\sqrt{x-y}+x=2+\left(x-y-1\right)\sqrt{y}\\2y^2-3x+6y+1=2\sqrt{x-2y}-\sqrt{4x-5y-3}\end{matrix}\right.\)
Giải HPT: \(\left[{}\begin{matrix}\sqrt{x}\left(1+y\right)=2y\\\sqrt{y}\left(1+z\right)=2z\\\sqrt{z}\left(1+x\right)2x\end{matrix}\right.\)
\(\left\{{}\begin{matrix}x^2y-3x-1=3x\sqrt{y}\left(\sqrt{1-x}-1\right)^3\\\sqrt{8x^2-3xy+4y^2}+\sqrt{xy}=4y\end{matrix}\right.\)
10. giải hpt bằng phương pháp thế:6) left{{}begin{matrix}2y-403x+y-4end{matrix}right.7) left{{}begin{matrix}4x-6y2x-dfrac{3}{2}ydfrac{1}{2}end{matrix}right.8) left{{}begin{matrix}dfrac{x}{3}+dfrac{y}{2}12x+3ydfrac{2}{5}end{matrix}right.9) left{{}begin{matrix}3x-2y2x+3y6end{matrix}right.10) left{{}begin{matrix}2x+3y24x-y-10end{matrix}right.11) left{{}begin{matrix}3x-2y32x-dfrac{4}{3}y1end{matrix}right.12) left{{}begin{matrix}5x+y32x+0,4y1,2end{matrix}right.giúp mk vs ạ mai mk học rồi
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10. giải hpt bằng phương pháp thế:
6) \(\left\{{}\begin{matrix}2y-4=0\\3x+y=-4\end{matrix}\right.\)
7) \(\left\{{}\begin{matrix}4x-6y=2\\x-\dfrac{3}{2}y=\dfrac{1}{2}\end{matrix}\right.\)
8) \(\left\{{}\begin{matrix}\dfrac{x}{3}+\dfrac{y}{2}=1\\2x+3y=\dfrac{2}{5}\end{matrix}\right.\)
9) \(\left\{{}\begin{matrix}3x-2=y\\2x+3y=6\end{matrix}\right.\)
10) \(\left\{{}\begin{matrix}2x+3y=2\\4x-y-1=0\end{matrix}\right.\)
11) \(\left\{{}\begin{matrix}3x-2y=3\\2x-\dfrac{4}{3}y=1\end{matrix}\right.\)
12) \(\left\{{}\begin{matrix}5x+y=3\\2x+0,4y=1,2\end{matrix}\right.\)
giúp mk vs ạ mai mk học rồi
Giải hệ phương trình:
a) left{{}begin{matrix}2x-y3x+2y-1end{matrix}right.
b) left{{}begin{matrix}dfrac{3}{2}x-ydfrac{1}{2}3x-2y1end{matrix}right.
c) left{{}begin{matrix}5left(x+2yright)3x-12x+43left(x-5yright)-12end{matrix}right.
d) left{{}begin{matrix}dfrac{1}{x}-dfrac{1}{y}1dfrac{3}{x}+dfrac{4}{y}5end{matrix}right.
e) left{{}begin{matrix}dfrac{2x}{x+1}+dfrac{y}{y+1}sqrt{2}dfrac{x}{x+1}+dfrac{3y}{y+1}-1end{matrix}right.
Giúp mình với!!!
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Giải hệ phương trình:
a) \(\left\{{}\begin{matrix}2x-y=3\\x+2y=-1\end{matrix}\right.\)
b) \(\left\{{}\begin{matrix}\dfrac{3}{2}x-y=\dfrac{1}{2}\\3x-2y=1\end{matrix}\right.\)
c) \(\left\{{}\begin{matrix}5\left(x+2y\right)=3x-1\\2x+4=3\left(x-5y\right)-12\end{matrix}\right.\)
d) \(\left\{{}\begin{matrix}\dfrac{1}{x}-\dfrac{1}{y}=1\\\dfrac{3}{x}+\dfrac{4}{y}=5\end{matrix}\right.\)
e) \(\left\{{}\begin{matrix}\dfrac{2x}{x+1}+\dfrac{y}{y+1}=\sqrt{2}\\\dfrac{x}{x+1}+\dfrac{3y}{y+1}=-1\end{matrix}\right.\)
Giúp mình với!!!
giải hệ pt bằng phương pháp thế:1) left{{}begin{matrix}x+y3x+2y5end{matrix}right.2) left{{}begin{matrix}x-y3y2x+1end{matrix}right.3) left{{}begin{matrix}2x+3y4y-x-2end{matrix}right.4) left{{}begin{matrix}xy+2x3y+8end{matrix}right.5) left{{}begin{matrix}2x-y13x-4y2end{matrix}right.giúp mk vs ạ mai mk hc rồi
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giải hệ pt bằng phương pháp thế:
1) \(\left\{{}\begin{matrix}x+y=3\\x+2y=5\end{matrix}\right.\)
2) \(\left\{{}\begin{matrix}x-y=3\\y=2x+1\end{matrix}\right.\)
3) \(\left\{{}\begin{matrix}2x+3y=4\\y-x=-2\end{matrix}\right.\)
4) \(\left\{{}\begin{matrix}x=y+2\\x=3y+8\end{matrix}\right.\)
5) \(\left\{{}\begin{matrix}2x-y=1\\3x-4y=2\end{matrix}\right.\)
giúp mk vs ạ mai mk hc rồi
Giải phương trình:
1. \(\left\{{}\begin{matrix}4x-2y=3\\6x-3y=5\end{matrix}\right.\)
2. \(\left\{{}\begin{matrix}2x-3y=5\\4x+6y=10\end{matrix}\right.\)
3. \(\left\{{}\begin{matrix}3x-4y+2=0\\5x+2y=14\end{matrix}\right.\)
4. \(\left\{{}\begin{matrix}2x+5y=3\\3x-2y=14\end{matrix}\right.\)