早知文理百科

解∫xarcsinxdx =1/2*∫arcsinxdx^2 =1/2*x^2*arcsinx-1/2∫x^2darcsinx =1/2*x^2*arcsinx-1/2∫x^2/√(1-x^2)dx 令x=sint，那么， ∫x^2/√(1-x^2)dx =∫(sint)^2/c...

d/dx是对x求导dy/dx是y对x的导数，即yd^2y/dx^2即d/dx(dy/dx),是y对x的导数，即y，是二阶导数 例y=x^2 dy/dx=(x^2)\'=2x d(x^2)/dx=2x d^2y/dx^2=(2x)\'=2 ...