Given the Maclaurin series $\sqrt{x+1} = 1 + \frac{x}{2} - \frac{x^2}{8} + \frac{x^3}{16} - ...$, for $-1 \le x \le 1$.
Find the first four terms of the Maclaurin series for $f(x) = \sqrt{A + x^B}$
where $A \ne 1$ and $B \ne 1$ should be defined below.
A =
B =
f(x) \approx