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Instead of the usual definition of derivative `Df(x),` if we define a new kind of derivative `D^*F(x)` by the formula `D*f(x)=lim_(h->0)(f^2(x+h)-f^2(x))/h ,w h e r ef^2(x)` mean `[f(x)]^2` and if `f(x)=xlogx` ,then `D^*f(x)|_(x=e)` has the value (A)e (B) 2e (c) 4e (d) none of these

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