Chủ đề:
Violympic toán 9Câu hỏi:
Giải phương trình sau
1) x3+1=2\(\sqrt[3]{2x-1}\)
2) 2(x2+2)=5\(\sqrt{x^3+1}\)
3) \(\sqrt[3]{\left(3x+1\right)^2}\)+\(\sqrt[3]{\left(3x-1\right)^2}\)+\(\sqrt[3]{9x^2-1}\)=1
4)2( x2-3x+2) =3\(\sqrt{x^3+8}\)
5)\(\sqrt{\frac{1}{2}-x}\)+\(\sqrt{\frac{1}{2}+x}\)=1
6) \(\sqrt{x-1}\)+\(\sqrt{x^3+x^2+x+1}\)=1+\(\sqrt{x^4-1}\)
7) (2x+7)\(\sqrt{2x+7}\)=x2+9x+7
8) \(\sqrt[3]{x+10}\)+\(\sqrt[3]{17-x}\)=3