Which of the following statement is/are not true?
1
If \(f(x)=|x|^{\frac{5}{2}}\), then \(f^{\prime}(x)=\frac{5}{2}|x|^{\frac{3}{2}}\)
2
\(f_n(x)=n \sin \left(\frac{x}{n}\right)\), converges to 1 as n→ ∞
3
There exist polynomial f(x) and g(x) with real coefficient such that \((\frac{f(x)}{g(x)})^2=x\)
4
\(f(x)=|x|^{\frac{3}{2}}\) is differentiable at x = 0