Let \(f\left( x \right) = \left\{ {\begin{array}{*{20}{c}} {{5^{\frac{1}{x}}},}&{x < 0}\\ {\lambda \left[ x \right],}&{x \ge 0} \end{array}} \right.\;\)and 位 系 R, then at x = 0
1
f is discontinuous
2
f is continuous only, if 位 = 0
3
f is continuous for all the values of 位
4
None of these