Q4 TUT 0102

[Victor Ivrii]

Specialize Theorem 4 of Section 2.3 of The Textbook to the case when $z$ is the center of the circle and show that
$$
f(z)=\int _0^{2\pi} f(z+r e^{it})\,dt.
$$

[Heng Kan]

See the attatched scanned picture. And the question should add an term which is 1/2pi