Given f(x)=4−12−x2/3,g(x)=tan⁡[x]x,    x≠01,    x=0,h(x)={x},k(x)=5log2⁡(x+3)then in [0, 1] Lagrange's mean value theorem is NOT applicable to the (where [.] and { .} represents greatest integerfunctions and fractional part functions, respectively)