1.确定下列函数的凸性区间与拐点:-|||-(1) =2(x)^3-3(x)^2-36x+25 ;(2) =x+dfrac (1)(x);-|||-(3) =(x)^2+dfrac (1)(x) ;(4) =ln ((x)^2+1);-|||-(5) =dfrac (1)(1+{x)^2}

1.确定下列函数的凸性区间与拐点:-|||-(1) =2(x)^3-3(x)^2-36x+25 ;(2) =x+dfrac (1)(x);-|||-(3) =(

1.确定下列函数的凸性区间与拐点:-|||-(1) =2(x)^3-3(x)^2-36x+25 ;(2) =x+dfrac (1)(x);-|||-(3) =(

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