Выбериверныеответы

Представьвыражениеввидедроби. Еслинеобходимо, сократи.

1. \(\dfrac{3}{2a}-\dfrac{5}{2a}=\) [ \(\frac{1}{a}\) | \(\frac{1}{2a}\) | \(-\frac{1}{a}\) | \(a\) ].
2. \(\dfrac{13}{2b}-\dfrac{6b+13}{2b}=\) [ \(-3\) | \(\frac{13}{3b}\) | \(\frac{1}{b}\) | \(b\) ].
3. \(\dfrac{3x+y}{x+y}-\dfrac{2x+y}{x+y}+\dfrac{x-y}{x+y}=\) [ \(\frac{x-y}{x+y}\) | \(\frac{2x-y}{x+y}\) | \(\frac{2x+y}{x+y}\) | \(\frac{2x-y}{x-y}\) ].