# How to find the bandwidth of the transmitted M-FSK signal?

I'm tried to find the solution, but I failed.

my question in the figure below, and the correct answer it's shown at the end of Figure.

I'm using this formula but the answer is not correct! Is there another solution to this question?

• @Abdallah_98 Look at $\Delta F$ in the formula, and look at $\Delta F$ for the carriers you actually have. – Dan Boschen Jun 19 at 12:19