y=xarcsin(x/2)+根号(4-x平方),求导数,麻烦写详细点,
问题描述:
y=xarcsin(x/2)+根号(4-x平方),求导数,麻烦写详细点,
答
y=xarcsin(x/2)+√(4-x^2),y'=[xarcsin(x/2)]'+[√(4-x^2)]',=arcsin(x/2)+x*1/2*1/√(1-x^2/4)+1/2*(-2x)*1/√(4-x^2),=arcsin(x/2)+x/√(4-x^2)-x/√(4-x^2),=arcsin(x/2)解毕