Fourier Series synthesis

[john1115635]

no idea how to make use of the equation and start with it.

 

[blamocur]

Generally, the formula for FS synthesis is $x(t) = \sum_{k=-\infty}^\infty C_k e^{j\omega k}$, where $\omega$ is the base frequency. But it is not clear from you post what the base frequency is.