(\(\frac{3}{2x}+1\)) = (\(\frac{3}{2x}+1\))(x2 + 1) (ĐKXĐ: x \(\ne\) 0)
\(\Leftrightarrow\) (\(\frac{3}{2x}+1\)) - (\(\frac{3}{2x}+1\))(x2 + 1) = 0
\(\Leftrightarrow\) (\(\frac{3}{2x}+1\))(1 - x2 - 1) = 0
\(\Leftrightarrow\) -x2(\(\frac{3}{2x}+1\)) = 0
\(\Leftrightarrow\) -x2 = 0 hoặc \(\frac{3}{2x}+1\) = 0
\(\Leftrightarrow\) x = 0 và x = \(\frac{-3}{2}\)
Vì x = 0 KTM ĐKXĐ nên
\(\Rightarrow\) x = \(\frac{-3}{2}\)
Vậy S = {\(\frac{-3}{2}\)}
Chúc bn học tốt!!