S
skylinehermes


giải pt sau:
2\sqrt[3]{2x-1}=27x^3-27x^2+13x-2
\sqrt[2]{1+x}+\sqrt[2]{1-x}\leq2-\frac{x^4}{4}
2\sqrt[3]{2x-1}=27x^3-27x^2+13x-2
\sqrt[2]{1+x}+\sqrt[2]{1-x}\leq2-\frac{x^4}{4}