In mathematicseven functions and odd functions are functions which satisfy particular symmetry relations, with respect to taking additive inverses. They are important in many areas of mathematical analysis, especially the theory of power seriesand Fourier series. They are named for the parity of the powers of the power functions which satisfy each condition: the function f(x) = xn is an even function if n is an even integer, and it is an odd function if n is an odd integer.
i am talking about delhi odd even rule
if u have a more time to speak then start with climate change,,environmental effects,global warming,,and traffic problems{time wasting,,no way for ambulance,etcc.} and enter into the solution which choosen by some developed countries like china and paris,,etcc then enter into explaining the concept etcccccc...if u hve less time then directly enter into topic wht is odd even rule which countries choosen y choosen,,what are positives and negatives