2 bọn não hẹp 

\(\Leftrightarrow\sqrt{5x-1}-2x^2-3x+\sqrt[3]{9-x}+1=0\)

\(\Leftrightarrow x=1\)

a)x-4/9:2/3=1/4  

\(\Leftrightarrow x-\frac{4}{9}=\frac{1}{4}\times\frac{2}{3}\)

\(\Leftrightarrow x-\frac{4}{9}=\frac{1}{6}\)

\(\Leftrightarrow x=\frac{1}{6}+\frac{4}{9}\)

\(\Leftrightarrow x=\frac{11}{18}\)

chết tui quên mất đề rồi

1.B

2.D

3.B

4.D

5.B

6.C

7.B

8.C

9.B

10.B

2^x*3^x*\(4^{x^2}\)=\(\frac{4.36x}{x+1}\)

\(2^x.3^x.4^{x^2}=\frac{144x}{x+1}\)

\(2^x.3^x.4^{x^2}-\frac{144x}{x+1}=0\)

\(\frac{\left(x+1\right)2^x.3^x.4^{x^2}-144x}{x+1}=0\)

\(\left(x+1\right)2^x.3^x.4^{x^2}-144x=0\)

\(x=\frac{71}{10000}\)