Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

$v_1 = v_2 = v_3$
We can write the expression for the speed of a wave as: $v = \sqrt{\frac{F}{\mu}}$ Since the waves are moving along the same string, the speed of each wave is the same. The speed of the wave does not depend on the amplitude. Therefore; $v_1 = v_2 = v_3$