Bài 6:
1: ĐKXĐ: \(m\ne2\)
2: ĐKXĐ: \(m\ne0\)
6: \(f\left(-3\right)+6\cdot f\left(2\right)\)
\(=\dfrac{1}{3}\cdot\left(-3\right)-2+6\cdot\left[\dfrac{1}{3}\cdot2-2\right]\)
\(=-1-2+6\cdot\left(\dfrac{2}{3}-2\right)\)
\(=-3+6\cdot\dfrac{-4}{3}\)
\(=-3-8\)
=-11