1. | \(\dfrac{3v}{4}\) | 2. | \(\dfrac{v}{3}\) |
3. | \(\dfrac{2v}{3}\) | 4. | \(\dfrac{4v}{3}\) |
1. | \(\dfrac{1}{v} = \dfrac{1}{v_1}+\dfrac{1}{v_2}\) | 2. | \(\dfrac{2}{v} = \dfrac{1}{v_1}+\dfrac{1}{v_2}\) |
3. | \(\dfrac{v}{2} = \dfrac{v_1+v_2}{2}\) | 4. | \(v = \sqrt{v_1v_2}\) |