This book is especially written for the students of B.A. (Mathematics), B.Sc., (Mathematics & Physics), M.A. (Mathematics), M.Sc. (Mathematics & Physics) and B.E./B.Tech. Besides, it will also be of immense value to the aspirants of AMIE,GATE, CSIR- UGC (NET) and other competitive examinations. A set of objective problems (including questions asked in the examinations of various universities, GATE, NET, etc.) has been provided at the end of each chapter. Also, several new solved examples have been added so that the reader may gain confidence in the techniques of solving problems.