Violympic toán 9
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H24
11 tháng 8 2021 lúc 16:50
Giải hệ pt:
\(\left\{{}\begin{matrix}x^2+2y^2+3xy+3=0\\\dfrac{x-y+18}{\left(x+y\right)^2}=9\sqrt{x-y}\end{matrix}\right.\)
Giải hệ PT:
\(\left\{{}\begin{matrix}x^3-2x^2y-4x=y^3-2xy^2-4y\\x^3+2y^3=4x+3y\end{matrix}\right.\)
Giải hệ phương trình:
1. left{{}begin{matrix}x+32sqrt{left(3y-xright)left(y+1right)}sqrt{3y-2}-sqrt{dfrac{x+5}{2}}xy-2y-2end{matrix}right.
2. left{{}begin{matrix}sqrt{2y^2-7y+10-xleft(y+3right)}+sqrt{y+1}x+1sqrt{y+1}+dfrac{3}{x+1}x+2yend{matrix}right.
3. left{{}begin{matrix}sqrt{4x-y}-sqrt{3y-4x}12sqrt{3y-4x}+yleft(5x-yright)xleft(4x+yright)-1end{matrix}right.
4. left{{}begin{matrix}9sqrt{dfrac{41}{2}left(x^2+dfrac{1}{2x+y}right)}3+40xx^2+5xy+6y4y^2+9x+9end{matrix}right.
5. left{{}begin{mat...
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Giải hệ phương trình:
1. \(\left\{{}\begin{matrix}x+3=2\sqrt{\left(3y-x\right)\left(y+1\right)}\\\sqrt{3y-2}-\sqrt{\dfrac{x+5}{2}}=xy-2y-2\end{matrix}\right.\)
2. \(\left\{{}\begin{matrix}\sqrt{2y^2-7y+10-x\left(y+3\right)}+\sqrt{y+1}=x+1\\\sqrt{y+1}+\dfrac{3}{x+1}=x+2y\end{matrix}\right.\)
3. \(\left\{{}\begin{matrix}\sqrt{4x-y}-\sqrt{3y-4x}=1\\2\sqrt{3y-4x}+y\left(5x-y\right)=x\left(4x+y\right)-1\end{matrix}\right.\)
4. \(\left\{{}\begin{matrix}9\sqrt{\dfrac{41}{2}\left(x^2+\dfrac{1}{2x+y}\right)}=3+40x\\x^2+5xy+6y=4y^2+9x+9\end{matrix}\right.\)
5. \(\left\{{}\begin{matrix}\sqrt{xy+\left(x-y\right)\left(\sqrt{xy}-2\right)}+\sqrt{x}=y+\sqrt{y}\\\left(x+1\right)\left[y+\sqrt{xy}+x\left(1-x\right)\right]=4\end{matrix}\right.\)
6. \(\left\{{}\begin{matrix}x^4-x^3+3x^2-4y-1=0\\\sqrt{\dfrac{x^2+4y^2}{2}}+\sqrt{\dfrac{x^2+2xy+4y^2}{3}}=x+2y\end{matrix}\right.\)
7. \(\left\{{}\begin{matrix}x^3-12z^2+48z-64=0\\y^3-12x^2+48x-64=0\\z^3-12y^2+48y-64=0\end{matrix}\right.\)
Giải hệ \(\left\{{}\begin{matrix}\left(x-2y\right)\left(y^2-4y\right)=-2\\x-y^2+2y=-3\end{matrix}\right.\)
H24
27 tháng 7 2021 lúc 10:24
Giải hệ pt:
\(\left\{{}\begin{matrix}\left(x-1\right)\left(y-1\right)\left(x+y-2\right)=6\\x^2+y^2-2x-2y=3\end{matrix}\right.\)
giải hệ pt\(\left\{{}\begin{matrix}x^3+y^3-3xy=-1\\x^2y+y^2x+x^2+y^2=4\end{matrix}\right.\)
giải hệ pt:
(1)\(\left\{{}\begin{matrix}2\text{x}+2y+2\text{x}y=10\\x^2+y^2=5\end{matrix}\right.\)
(2)\(\left\{{}\begin{matrix}\sqrt{x}+\sqrt{y}=3\\\sqrt{xy}=2\end{matrix}\right.\)
(3)\(\left\{{}\begin{matrix}x-y=1\\x.y=6\end{matrix}\right.\)
(4)\(\left\{{}\begin{matrix}|x|+y=3\\2|x|-y=3\end{matrix}\right.\)
giải hệ phương trình:
1, \(\left\{{}\begin{matrix}2+6y=\frac{x}{y}-\sqrt{x-2y}\\\sqrt{x+\sqrt{x-2y}}=x+3y-2\end{matrix}\right.\)
2, \(\left\{{}\begin{matrix}x^2+y^2+xy+1=4y\\y\left(x+y\right)^2=2x^2-7y+2\end{matrix}\right.\)
3, \(\left\{{}\begin{matrix}x^2\left(y+1\right)=6y-2\\x^4y^2+2x^2y^2+y\left(x^2+1\right)=12y^2-1\end{matrix}\right.\)
Giaỉ hệ phương trình
1) \(\left\{{}\begin{matrix}x^2-2xy+x+y=0\\x^4-x^2\left(4y-3\right)+y^2=0\end{matrix}\right.\)
2)\(\left\{{}\begin{matrix}3x^2+2xy+y^2=11\\x^2+2xy+3y^2=17\end{matrix}\right.\)
3)\(\left\{{}\begin{matrix}x^3-2y^3-x-4y=0\\13x^2-41xy+21y^2+9=0\end{matrix}\right.\)