Đặt \(2018=a\)
\(\Rightarrow\sqrt{a-1+\sqrt{x-1}}=a-x\)
\(\Leftrightarrow a-1+\sqrt{x-1}=\left(a-x\right)^2\)
\(\Leftrightarrow\sqrt{x-1}=x^2-2ax+a^2-a+1\)
\(\Leftrightarrow x-1=\left(x^2-2ax+a^2-a+1\right)^2\)
\(\Leftrightarrow\left[\left(x-a\right)^2-x+1\right]\left[\left(x-a\right)^2+x-2a+2\right]=0\)
Giải Phương Trình
a) \(\sqrt{x-y+z}=\sqrt{x}-\sqrt{y}+\sqrt{z}\)
b)\(\sqrt[3]{x-2}+\sqrt{x+1}=3\)
c)\(\text{|x-2017|^{2017}+\text{|x-2018|}^{2018}=1}\)
Giải pt:\(|x-2017|^{2017}+|x-2018|^{2018}=1\)
Rút gọn biểu thức: A= \(\frac{\sqrt{x-2017-2\sqrt{x-2018}}}{\sqrt{x-2018}-1}\)Với x > 2019
\(GPT\)
\(\frac{\sqrt{x-2016}-1}{x-2016}+\frac{\sqrt{y-2017}-1}{y-2017}+\frac{\sqrt{z-2018}-1}{z-2018}=\frac{3}{4}\)
HELP ME
So sánh:
a) x=\(\sqrt{2017}-\sqrt{2018}\)và y=\(\sqrt{2016}-\sqrt{2017}\)
b) x=\(\sqrt{2019}+\sqrt{2017}\)và y=\(2\sqrt{2018}\)
\(\frac{1+2017\sqrt{2018}\:-2018\sqrt{2017}}{\sqrt{2017\:\:}+\sqrt{2018}+\sqrt{2017}\cdot\sqrt{2018}}=\sqrt{2017.2018\:}\)
C = \(\frac{1}{x^2-\sqrt{x}}\div\frac{\sqrt{x}+1}{x\sqrt{x}+x+\sqrt{x}}\)
a) Rút gọn C
b) Tìm D khi x = \(\sqrt{2018+2\sqrt{2017}}\)
Tìm giá trị lớn nhất của biểu thức \(A=\frac{\sqrt{x-2017}}{x+1}+\frac{\sqrt{x-2018}}{x-1}\) .
Giải pt: \(\sqrt{x+2\sqrt{x+1}}+\sqrt{x-2\sqrt{x-1}}=\sqrt{x-1}+8\)
