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Найди наименьший общий знаменатель дробей.

\(\dfrac{1}{4a}\) и \(\dfrac{1}{3b}|3 \cdot 4\cdot ab=12ab\) .

1. \(\dfrac{3}{4a^2b^3}\) и \(\dfrac{5}{6ab^4}\) , \(12a^2\,\cdot\) [ ].

2. \(\dfrac{1}{6a^3b^4c}\) и \(\dfrac{2}{9a^4b^3c^2}\) , [ ].

3. \(\dfrac{1}{3x^5y^4z^3}\) , \(\dfrac{2}{5x^4y^5z^3}\) и \(\dfrac{3}{10x^2y^3z^4}\) , [ ].

4. \(\dfrac{1}{2a-b}\) и \(\dfrac{1}{a+b}\) , [ ].

5. \(\dfrac{1}{a-b}\) и \(\dfrac{1}{2a(a-b)}\) , [ ].