User:Catalystcf/statistics

Leibnitz
 * $$ {d\over dx}\, \int_{f_1(x)}^{f_2(x)} g(t,x) \,dt = g(f_2(x),x) {f_2'(x)} - g(f_1(x),x) {f_1'(x)} + \int_{f_1(x)}^{f_2(x)} {\partial \over \partial x}  g(t,x) \,dt $$