f(x)=3tan2x和f(x)=e^x/e^x+1的反函数怎么求?

f(x)=3tan2x和f(x)=e^x/e^x+1的反函数怎么求? f(x)=x/tan2x 求极限x趋于0 f'（cosx+2）=sin2x+tan2x求f(x) 函数f(x)=tan2x/tanx的定义域是? 函数f(x)=2+sinx-tan2x,如果f(a)=1,则f(-a)=? 已知函数f(x)满足f(tanx)=1/tan2x,则f(2)=? 几道求极限的题和几道微分题~急1.lim (x^1/3-1)/(x^1/2-1)=?x→12.lim tan2x/sin5x=?x→03.lim (e^x-1)/x=?x→04.f(x)=arccos1/x,则f'(-2)=?5.函数f(x)=(x-1)x^2/3的极小点为x=?6.d(e^sinx^2)=_____ d(sinx^2)=______d(x^2)下周考数学了 f(x-3)=x*x-5x+3.求f(x)和f(e的x平方)?是这样的f(x-3)=x*x-5x+3.求f(x)和f(e^x)? the function f is defined by f(X)=cosec x + tan2x ,A.show that the roots of f(x)=0 satisfy the pls solve the function f is defined by f(X)=cosec x + tan2x ,A.show that the roots of f(x)=0 satisfy the equation2cos^3 (x) -2cos^2(X)-2cosx+1=0 高数函数连续极限习题已知函数f(x)= (tan2x)/x,-π/4 f(x)=tan2x/1-tan²2x 的周期 设f(x)=e^x+a,x>0和3x+b,x f(x)=e^x/x求导 f(x)=x*e^-x求导 设f(x)=1(|x|1);g(X)=e^x,求f[g(x)]和g[f(x)]. f(1+x)-2f(1-x)=3e^x求f(x) 如果f(e^X)=X,则f(3)等于 已知函数f(x)=tanxtan2x/tan2x-tanx+根号3(sin^2x-cos^2x)求函数f(x)的定义域和已知函数f(x)=tanxtan2x/tan2x-tanx+根号3(sin^2x-cos^2x)（1）求函数f(x)的定义域和最大值（2）已知△ABC的内角A,B,C所对的边分别为a,b,