1.2.1 Appendix

Let us integrate an arbitrary function from to .


Defining as


where – average value of a function on the interval from to , . Then equation (A1) can be rewritten as


Considering a Taylor series expansion of the integrand (A3) in and neglecting and higher order members, we get


The second term in (A4) vanishes upon integration, therefore (A4) can be expressed as


where the correction factor is