Cockroach Lecture by Dr. Priyanka Dadupanthi.

It belongs to phylum Arthropoda. It is a cursorial animal. Its body is divided into head, thorax and abdomen. Chitinous skeleton is present in cockroach. Tripodial movement is present in cockroach.

Linear Differential Equation Of Second Order Lecture by Megha Sharma.

An Equation of form dy/dx + P(x)y +Q(x) y=R(x) is called linear differential equation of second order where P,Q & R are function of x.