Violympic toán 9
Các câu hỏi tương tự
Giải phương trình vô tỉ:
a) 1+frac{2}{3}sqrt{x-x^2}sqrt{x}+sqrt{1-x}
b) sqrt{2x+3}+sqrt{x+1}3x+2sqrt{2x^2+5x+3}-2
c) sqrt{7x+7}+sqrt{7x-6}+2sqrt{49x^2+7x-42}181-4x
d) frac{sqrt{x+4}+sqrt{x-4}}{2}x+sqrt{x^2-16}-6
e) 5sqrt{x}+frac{5}{2sqrt{x}}2x+frac{1}{2x}+4
g) sqrt{3x-2}+sqrt{x-1}4x-9+2sqrt{3x^2-5x+2}
Đọc tiếp
Giải phương trình vô tỉ:
a) \(1+\frac{2}{3}\sqrt{x-x^2}=\sqrt{x}+\sqrt{1-x}\)
b) \(\sqrt{2x+3}+\sqrt{x+1}=3x+2\sqrt{2x^2+5x+3}-2\)
c) \(\sqrt{7x+7}+\sqrt{7x-6}+2\sqrt{49x^2+7x-42}=181-4x\)
d) \(\frac{\sqrt{x+4}+\sqrt{x-4}}{2}=x+\sqrt{x^2-16}-6\)
e) \(5\sqrt{x}+\frac{5}{2\sqrt{x}}=2x+\frac{1}{2x}+4\)
g) \(\sqrt{3x-2}+\sqrt{x-1}=4x-9+2\sqrt{3x^2-5x+2}\)
28 tháng 11 2019 lúc 23:30
Giải các pt sau:
a) sqrt{x+8}+frac{9x}{sqrt{x+8}}-6sqrt{x}0
b) x^4-2x^3+sqrt{2x^3+x^2+2}-20
c) 3xsqrt[3]{x+7}left(x+sqrt[3]{x+7}right)7x^3+12x^2+5x-6
d) 4x^2+left(8x-4right)sqrt{x}-13x+2sqrt{2x^2+5x-3}
e) 16x^2+19x+7+4sqrt{-3x^2+5x+2}left(8x+2right)left(sqrt{2-x}+2sqrt{3x+1}right)
f) left(5x+8right)sqrt{2x-1}+7xsqrt{x+3}9x+8-left(x+26right)sqrt{x-1}
g) sqrt[3]{3x+1}+sqrt[3]{5-x}+sqrt[3]{2x-9}-sqrt[3]{4x-3}0
Đọc tiếp
Giải các pt sau:
a) \(\sqrt{x+8}+\frac{9x}{\sqrt{x+8}}-6\sqrt{x}=0\)
b) \(x^4-2x^3+\sqrt{2x^3+x^2+2}-2=0\)
c) \(3x\sqrt[3]{x+7}\left(x+\sqrt[3]{x+7}\right)=7x^3+12x^2+5x-6\)
d) \(4x^2+\left(8x-4\right)\sqrt{x}-1=3x+2\sqrt{2x^2+5x-3}\)
e) \(16x^2+19x+7+4\sqrt{-3x^2+5x+2}=\left(8x+2\right)\left(\sqrt{2-x}+2\sqrt{3x+1}\right)\)
f) \(\left(5x+8\right)\sqrt{2x-1}+7x\sqrt{x+3}=9x+8-\left(x+26\right)\sqrt{x-1}\)
g) \(\sqrt[3]{3x+1}+\sqrt[3]{5-x}+\sqrt[3]{2x-9}-\sqrt[3]{4x-3}=0\)
giải các phương trình sau ( mình đang cần gấp cảm ơn )
1) x+sqrt{4-x^2} 2+2x.sqrt{4-x^2}
2) sqrt{2x^2+11x+19}+sqrt{2x^2+5x+1}3.( x+1)
3) sqrt{4x^2+5x+1}- 2sqrt{x^2-x+1}9x-3
4) sqrt{2x^2+7x+10}+sqrt{2x^2+x+4} 3( x+1)
5) 2x2+5x-17.sqrt{x^3-1}
6) 2x2+4 3sqrt{x^3+1}
7) 10sqrt{x^3+1} 3x2+6
Đọc tiếp
giải các phương trình sau ( mình đang cần gấp cảm ơn )
1) x+\(\sqrt{4-x^2}\)= 2+2x.\(\sqrt{4-x^2}\)
2) \(\sqrt{2x^2+11x+19}\)+\(\sqrt{2x^2+5x+1}\)=3.( x+1)
3) \(\sqrt{4x^2+5x+1}\)- 2\(\sqrt{x^2-x+1}\)=9x-3
4) \(\sqrt{2x^2+7x+10}\)+\(\sqrt{2x^2+x+4}\)= 3( x+1)
5) 2x2+5x-1=7.\(\sqrt{x^3-1}\)
6) 2x2+4 = 3\(\sqrt{x^3+1}\)
7) 10\(\sqrt{x^3+1}\)= 3x2+6
giải các phương trình sau
1) x+sqrt{4-x^2}2+2xsqrt{4-x^2}
2) sqrt{2x^2+11x+19}+sqrt{2x^2+5x+1}3.( x+1)
3) sqrt{2x^2+7x+10}+sqrt{2x^2+x+4} 3.(x+1)
4) sqrt{4x^2+5x+1}- 2sqrt{x^2-x-1} 9x-3
5) 2x2+43.sqrt{x^3+1}
6) 2x2+5x-17sqrt{x^3-1}
Đọc tiếp
giải các phương trình sau
1) x+\(\sqrt{4-x^2}\)=2+2x\(\sqrt{4-x^2}\)
2) \(\sqrt{2x^2+11x+19}\)+\(\sqrt{2x^2+5x+1}\)=3.( x+1)
3) \(\sqrt{2x^2+7x+10}\)+\(\sqrt{2x^2+x+4}\)= 3.(x+1)
4) \(\sqrt{4x^2+5x+1}\)- 2\(\sqrt{x^2-x-1}\)= 9x-3
5) 2x2+4=3.\(\sqrt{x^3+1}\)
6) 2x2+5x-1=7\(\sqrt{x^3-1}\)
Giair phương trình
a, \(3\sqrt{\left(x+1\right)\left(x-3\right)}+x^2-2x=7\)
b, \(\sqrt{2x+3}+\sqrt{x+1}=3x+2\sqrt{2x^2+5x+3}-16\)
c, \(\left(x^2-4\right)+4\left(x-2\right).\sqrt{\frac{x+2}{x-2}}=3\)
d, \(\frac{9}{x^2}+\frac{2x}{\sqrt{2x^2+9}}=1\)
e, \(3\sqrt{2+x}-6\sqrt{2-x}+4\sqrt{4-x^2}=10-3x\)
(Gấp xin hãy giải hộ vs ạ chiều e học rùi . E xin cảm ơn) GIẢI PHƯƠNG TRÌNH SAU
1)frac{3}{sqrt{x-2}+3}-frac{1}{sqrt{x+6}+3}2
2)sqrt{x^2+2x}+sqrt{2x-1}sqrt{3x^2+4x+1}
4) ( 3x+1).sqrt{2x^2-1}5x2+frac{3x}{2}
5) x2+7x(2x+1).sqrt{x^2+x+6}
6) sqrt{5x^2+6x+5}. (5x2+6x++6)4x. (16x2+1)
Đọc tiếp
(Gấp xin hãy giải hộ vs ạ chiều e học rùi . E xin cảm ơn) GIẢI PHƯƠNG TRÌNH SAU
1)\(\frac{3}{\sqrt{x-2}+3}\)-\(\frac{1}{\sqrt{x+6}+3}\)=2
2)\(\sqrt{x^2+2x}\)+\(\sqrt{2x-1}\)=\(\sqrt{3x^2+4x+1}\)
4) ( 3x+1).\(\sqrt{2x^2-1}\)=5x2+\(\frac{3x}{2}\)
5) x2+7x=(2x+1).\(\sqrt{x^2+x+6}\)
6) \(\sqrt{5x^2+6x+5}\). (5x2+6x++6)=4x. (16x2+1)
Giải PT a, 5sqrt{2x^2+3x+9}2x^2+3x+3
b. 9-sqrt{81-7x^3}frac{x^3}{2}
c. x^2+3-sqrt{2x^2-3x+2}frac{3}{2}left(x+1right)
d. sqrt{9x-2x^2}-9x+2x^2+60
e. sqrt{x^2+x-1}+sqrt{x-x^2+1}x^2-x+2
f. sqrt{x^2+x-5}+sqrt{x-x^2+3}x^2-3x+4
Đọc tiếp
Giải PT a, \(5\sqrt{2x^2+3x+9}=2x^2+3x+3\)
b. \(9-\sqrt{81-7x^3}=\frac{x^3}{2}\)
c. \(x^2+3-\sqrt{2x^2-3x+2}=\frac{3}{2}\left(x+1\right)\)
d. \(\sqrt{9x-2x^2}-9x+2x^2+6=0\)
e. \(\sqrt{x^2+x-1}+\sqrt{x-x^2+1}=x^2-x+2\)
f. \(\sqrt{x^2+x-5}+\sqrt{x-x^2+3}=x^2-3x+4\)
25 tháng 4 2020 lúc 11:56
Gpt: a) sqrt[4]{3left(x+5right)}-sqrt[4]{11-x}sqrt[4]{13+x}-sqrt[4]{3left(3-xright)}
b) frac{1+2sqrt{x}-xsqrt{x}}{3-x-sqrt{2-x}}2left(frac{1+xsqrt{x}}{1+x}right) c) sqrt{x+1}+frac{4left(sqrt{x+1}+sqrt{x-2}right)}{3left(sqrt{x-2}+1right)^2}3
d) sqrt{frac{x-2}{x+1}}+frac{x+2}{left(sqrt{x+2}+sqrt{x-2}right)^2}1 e) 2x+1+xsqrt{x^2+2}+left(x+1right)sqrt{x^2+2x+2}0
f) sqrt{2x+3}cdotsqrt[3]{x+5}x^2+x-6
Đọc tiếp
Gpt: a) \(\sqrt[4]{3\left(x+5\right)}-\sqrt[4]{11-x}=\sqrt[4]{13+x}-\sqrt[4]{3\left(3-x\right)}\)
b) \(\frac{1+2\sqrt{x}-x\sqrt{x}}{3-x-\sqrt{2-x}}=2\left(\frac{1+x\sqrt{x}}{1+x}\right)\) c) \(\sqrt{x+1}+\frac{4\left(\sqrt{x+1}+\sqrt{x-2}\right)}{3\left(\sqrt{x-2}+1\right)^2}=3\)
d) \(\sqrt{\frac{x-2}{x+1}}+\frac{x+2}{\left(\sqrt{x+2}+\sqrt{x-2}\right)^2}=1\) e) \(2x+1+x\sqrt{x^2+2}+\left(x+1\right)\sqrt{x^2+2x+2}=0\)
f) \(\sqrt{2x+3}\cdot\sqrt[3]{x+5}=x^2+x-6\)
Giải phương trình
a) \(\sqrt{x-2}=\sqrt{x^2-4x+3}\)
b) \(2\left(\sqrt{\dfrac{x-1}{4}}-3\right)=2\sqrt{\dfrac{4x-4}{9}}-\dfrac{1}{3}\)
c) \(\dfrac{9x-7}{\sqrt{7x+5}}=\sqrt{7x+5}\)
d) \(4+\sqrt{2x+6-6\sqrt{2x-3}}=\sqrt{2x-2+2\sqrt{2x-3}}\)