Find the derivatives of the following functions, and point out the increasing, decreasing intervals and minima of the functions according to the positive and negative of the derivatives (1)f(x)=lnx+x; (2)g(x)=x(x+1)(x-3) (3)g(x)=x+2sinx (4)u(x)=5-3x+2x^2-x^3

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• 2. Finding the derivative of function f (x) = (x ^ 2-5x + 6) / (x ^ 2 + 1)~
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• 12. High school derivative problem for help ~ f (x) = (x + 1) in (x + 1) Let f (x) = (x + 1) in (x + 1), for any x > = 0, f (x) > = ax holds, find the range of A
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