The Expansion of \(\left(1+\frac{x}{2}\right)^{-\frac{1}{2}}\) is:
1
\(1+\frac{x}{4}+\frac{3}{16} x^2+\ldots . . \)
2
\(1-\frac{x}{4}+\frac{3}{32} x^2+\ldots . \)
3
\(1+\frac{x}{4}+\frac{3}{32} x^2+\ldots . \)
4
\(1-\frac{x}{4}-\frac{3}{16} x^2+\ldots . .\)