y = arctan(x) y = 1/(1+(x)) * (x) = 1/(1+x) * 2x = 2x/(1+x)若是指y=x·arctan(x^2)则有y =arctanx^2 +x·2x/(1+x^4) 常用导数公式 1.y=c(c为常数) y\'=0 2...
