Ôn tập chương 1: Căn bậc hai. Căn bậc ba
Các câu hỏi tương tự
Giải phương trình:
a)sqrt{3x^2} x+2
b)sqrt{36x-77} -15sqrt{frac{x-2}{15}}4(5+sqrt{x-2})
c)sqrt{x-sqrt{2x-1}} sqrt{2}
d)sqrt{2x^2-4x+3} + sqrt{3x^2-6x+7} 2 - x2 + 2x
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Giải phương trình:
a)\(\sqrt{3x^2}\) = x+2
b)\(\sqrt{36x-77}\) -15\(\sqrt{\frac{x-2}{15}}\)=4(5+\(\sqrt{x-2}\))
c)\(\sqrt{x-\sqrt{2x-1}}\) = \(\sqrt{2}\)
d)\(\sqrt{2x^2-4x+3}\) + \(\sqrt{3x^2-6x+7}\) = 2 - x2 + 2x
Giải PT:a) dfrac{1}{2}sqrt{x-1}-dfrac{3}{2}sqrt{9x-9}+24sqrt{dfrac{x-1}{64}}-17b) sqrt{18x-9}-0,5sqrt{2x-1}+dfrac{1}{2}sqrt{25left(2x-1right)}+sqrt{49left(2x-1right)}24c) sqrt{36x-72}-15sqrt{dfrac{x-2}{25}}4left(5+sqrt{x-2}right)d) sqrt{dfrac{1}{3x+2}}-dfrac{1}{2}sqrt{dfrac{9}{3x+2}}+sqrt{dfrac{16}{3x+2}}-5sqrt{dfrac{1}{12x+8}}1e) dfrac{1}{2}sqrt{dfrac{49x}{x+2}}-3sqrt{dfrac{x}{4x+8}}-sqrt{dfrac{x}{x+2}}-sqrt{5}0
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Giải PT:
a) \(\dfrac{1}{2}\sqrt{x-1}-\dfrac{3}{2}\sqrt{9x-9}+24\sqrt{\dfrac{x-1}{64}}=-17\)
b) \(\sqrt{18x-9}-0,5\sqrt{2x-1}+\dfrac{1}{2}\sqrt{25\left(2x-1\right)}+\sqrt{49\left(2x-1\right)}=24\)
c) \(\sqrt{36x-72}-15\sqrt{\dfrac{x-2}{25}}=4\left(5+\sqrt{x-2}\right)\)
d) \(\sqrt{\dfrac{1}{3x+2}}-\dfrac{1}{2}\sqrt{\dfrac{9}{3x+2}}+\sqrt{\dfrac{16}{3x+2}}-5\sqrt{\dfrac{1}{12x+8}}=1\)
e) \(\dfrac{1}{2}\sqrt{\dfrac{49x}{x+2}}-3\sqrt{\dfrac{x}{4x+8}}-\sqrt{\dfrac{x}{x+2}}-\sqrt{5}=0\)
giải các phương trình sau:
\(\sqrt{x^2+6x+9}=3x-6\)
\(\sqrt{x^2-2x+1}=\sqrt{4x^2-4x+1}\)
\(\sqrt{4-5x}=2-5x\)
\(\sqrt{4-5x}=\sqrt{2-5x}\)
Tìm x:
a. \(\sqrt{x-3}>2\)
b. \(\sqrt{36x^2-12x+1}=5\)
c. \(\sqrt{9\left(5x^2-2x+16\right)}=3x+12\)(hướng dẫn cụ thể đi ạ)
giải phương trình:
a) \(\sqrt{x-1}=\sqrt{3x-2}+\sqrt{5x-1}\)
b) \(\sqrt{4x+1}-\sqrt{3x+4}=1\)
c) \(\sqrt{x^2-4x+4}+\sqrt{x^2-6x+9}=1\)
1.Tính: a, sqrt{left(5-sqrt{3}right)^2}-sqrt{left(sqrt{3}-2right)^2}
b, Bleft(2-sqrt{3}right).sqrt{26+15sqrt{3}}-left(2+sqrt{3}right).sqrt{26-15sqrt{3}}
c, sqrt{sqrt{5}-sqrt{3-sqrt{29-12sqrt{5}}}}
d, Aleft(sqrt{10}-sqrt{2}right)sqrt{3+sqrt{5}}
2.Giải pt:
a,sqrt{x^2-3x-2}x-2
b,5sqrt{x-1}-sqrt{36x-36}+sqrt{9x-9}sqrt{8x+12}
c,sqrt{x}+sqrt{1-x}+sqrt{xleft(1-xright)}1
Đọc tiếp
1.Tính: a, \(\sqrt{\left(5-\sqrt{3}\right)^2}-\sqrt{\left(\sqrt{3}-2\right)^2}\)
b, B=\(\left(2-\sqrt{3}\right).\sqrt{26+15\sqrt{3}}-\left(2+\sqrt{3}\right).\sqrt{26-15\sqrt{3}}\)
c, \(\sqrt{\sqrt{5}-\sqrt{3-\sqrt{29-12\sqrt{5}}}}\)
d, A=\(\left(\sqrt{10}-\sqrt{2}\right)\sqrt{3+\sqrt{5}}\)
2.Giải pt:
a,\(\sqrt{x^2-3x-2}=x-2\)
b,\(5\sqrt{x-1}-\sqrt{36x-36}+\sqrt{9x-9}=\sqrt{8x+12}\)
c,\(\sqrt{x}+\sqrt{1-x}+\sqrt{x\left(1-x\right)}=1\)
Giải pt:
a)\(\sqrt{x^2+3x+2}+\sqrt{x^2+6x+5}=\sqrt{2x^2+9x+7}\)
b)\(\sqrt{2x+3}+\sqrt{x+1}=3x+2\sqrt{2x^2+5x+3}-2\)
giải phương trình
a, \(\sqrt{4x-20}+3\sqrt{\dfrac{x-5}{9}}-\dfrac{1}{3}\sqrt{9x-45}=4\)
b, \(2x-x^2+\sqrt{6x^2-12x+7}=0\)
c, \(\dfrac{9x-7}{\sqrt{7x+5}}=\sqrt{7x+5}\)
tìm x1. 4x-sqrt{9x^2+6x+1}02. sqrt{4x}+20-3sqrt{5+x}+dfrac{4}{3}sqrt{9x+45}03. sqrt{x^2}+x+1x+24. sqrt{6x^2}+2-sqrt{3x^2}sqrt{26}-sqrt{13}5. dfrac{sqrt{x}-2}{sqrt{x}-4}dfrac{sqrt{x}-6}{sqrt{x}-7}6. sqrt{4x^2-4x+1}3giải từng bước ra cho mik nha,thank mn
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tìm x
1. 4x-\(\sqrt{9x^2+6x+1}\)=0
2. \(\sqrt{4x}+20-3\sqrt{5+x}+\dfrac{4}{3}\sqrt{9x+45}=0\)
3. \(\sqrt{x^2}+x+1=x+2\)
4. \(\sqrt{6x^2}+2-\sqrt{3x^2}=\sqrt{26}-\sqrt{13}\)
5. \(\dfrac{\sqrt{x}-2}{\sqrt{x}-4}=\dfrac{\sqrt{x}-6}{\sqrt{x}-7}\)
6. \(\sqrt{4x^2-4x+1}=3\)
giải từng bước ra cho mik nha,thank mn