设y=ln(1+x^2)则dy=

设y=ln(1+x^2)则dy= 设y=ln(x/1+x)-cot2x,求dy. 设y=ln[cos(1+3x^2)],则dy= 设y=ln(x)则dy=?gfng 设y=ln(1+e^-x)求dy 设函数y=ln(x³+1)求dy 设y=arctan(a/x)+1/2[ln(x-a)-ln(x+a)],求dy|x=0 设 x/y=ln(y/x) ,求 dy/dx 设函数y=ln(x-2),则dy/dx=多少 设Y= ln(1+e的x的2次幂）求dy 设y=ln x/x的平方,求dy 设参数方程{ x=arctant y=t-ln(1+t^2),则dy/dx= y=ln(2x+5),则dy= y=xarcsinx+ln 根号(1-x^2) 求dy y=cos2x+ln(1-2x)+cos1 求dy y=ln(x^2+1),求dy y=ln(2√x-1) 求dy 设y=[(x^2+1)/2]*(arctanx)^2-xarctanx+(1/2)ln(1+x^2),求y'以及dy