To find the wavelength of a wave without knowing the frequency and speed, you would need to have some additional information or context.
In general, the equation that relates wavelength, frequency, and speed is:
v = λf
where v represents the speed of the wave, λ is the wavelength, and f is the frequency.
If you don't have the frequency or speed, you would need to obtain one of these values from another source or experiment.
For example, if you have information about the frequency of a wave but not the speed, you could use the equation to solve for the wavelength if you know the speed of similar waves or if you have access to experimental data or relevant formulas.
Similarly, if you have information about the speed of a wave but not the frequency, you could rearrange the equation to solve for the wavelength if you have the frequency or can obtain it through experimentation or other means.
In summary, without knowing either the frequency or speed of a wave, it is generally not possible to determine the wavelength unless you have additional information or context to work with.