根据罗比达法则,分子分母同时求导lim(x趋向0)（x-arctanx）/（x-arcsinx）=lim(x趋向0)[1-1/(1+x^2)]/（1-1/根号（1-x^2））=lim(x趋向0)[x^2/(1+x^2)]/（-x^2/[(1+根号（1-x^2）(根号（1-x^2)]=-lim(x趋向0){(1+根...