x-∫[x:0]e^-t平方 dt]=x-(x-x^3/3 + (x^5)/(5*2!)-x^7/(7*3!)+...f=lim (x-->0)[x-∫[x:0]e^-t平方 dt]/(x^2)*sinx=lim (x-->0) (x^3/3-x^5/10)/((x^2)sinx)用罗比达法则上下求导f= lim (x-->0) (x^2-(x^4)/2)/(2*x...