\(\sqrt{x+5}=1+\sqrt{x}\)
ĐKXĐ : \(x\ge0\)
\(pt\Leftrightarrow x+5=\left(1+\sqrt{x}\right)^2\)
\(\Leftrightarrow x+5=x+2\sqrt{x}+1\)
\(\Leftrightarrow x+5-x-2\sqrt{x}-1=0\)
\(\Leftrightarrow-2\sqrt{x}+4=0\)
\(\Leftrightarrow\sqrt{x}=2\Rightarrow x=4\)(TMĐKXĐ)
giai phuong trinh
\(\sqrt{x-1}-\sqrt{5x-1}=\sqrt{3x-2}\)
\(\sqrt{x+2+3\sqrt{ }2x-5}+\sqrt{x-2-\sqrt{ }2x-5}=2\sqrt{2}\) 2\(\sqrt{2}\) giai phuong trinh
giai phuong trinh
\(x+\frac{1}{x}=1+\sqrt{6}\)
Cho\(\frac{x^2+1}{x}+\frac{x}{x^2+1}=\frac{5}{2}\)
hay giai phuong trinh tren
Giai phuong trinh sau:
\(\sqrt{x^2-6x+9}+\sqrt{x^2+10x+25}=8\)
giai bat phuong trinh va bieu dien ngiem tren truc so
x(x^2+2) > x^3-x+6
giai phuong trinh sau
x/x-1 + 1= x + 5/x + 2
giai phuong trinh sau : x^5-x^3y-y+1=0
cho phuong trinh (an x):(m-1)x +m^2 -1=0(1) a,giai phuong trinh (1) voi m=2 b, tim gia tri cua m sao cho phuong trinh (1) nhan x=3 lam nghiem
mk dang can gap .cam on truoc a
