How do you start expanding this function $$f(z)= \frac{1}{1+\sqrt{2-z}}$$ into two Taylor expansions about $z=0$?
The best I came up is to let $u=\sqrt{2-z}$ and then expand $f(z)$ as a geometric series.
How do you start expanding this function $$f(z)= \frac{1}{1+\sqrt{2-z}}$$ into two Taylor expansions about $z=0$?
The best I came up is to let $u=\sqrt{2-z}$ and then expand $f(z)$ as a geometric series.