Which of the following functions are continuous at x=0x=0x=0?
f(x)=xsin(1x),f(0)=0f(x) = x \sin(\frac{1}{x}), f(0)=0f(x)=xsin(x1),f(0)=0
g(x)=∣x∣x,g(0)=0g(x) = \frac{|x|}{x}, g(0)=0g(x)=x∣x∣,g(0)=0
h(x)=e−1/x2,h(0)=0h(x) = e^{-1/x^2}, h(0)=0h(x)=e−1/x2,h(0)=0
j(x)=sinxx,j(0)=1j(x) = \frac{\sin x}{x}, j(0)=1j(x)=xsinx,j(0)=1