1. a) \(\dfrac{x-3}{5}=\dfrac{7}{x-1}\)
b) \(\left(x-5\right)^{x+1}-\left(x-5\right)^{x+11}=0\)
2. Cho \(\dfrac{a+5}{a-5}=\dfrac{b+6}{b-6}\)( a khác 5; b khác 6)
CMR: \(\dfrac{a}{b}=\dfrac{5}{6}\)
Loga
Toán lớp 7
