MATHEMATICS FOR CLASS XI CHATTER-T by Upendra yadav
Targeted Audience Students in Class XI . IIT-JEE -Competitive exam . General Public
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INTRODUCTION Upendra yadav B.Sc. (H Mathematics from Delhi University Qualified exam: IIT-JAM,
SETS introduction : : cian Leorge Cantor and operatons involvinq Set. Sets are used to drfine the conccpt The theory sets was devoRo ed by (nerman mathemat- In this chabter, we discuss some basic clefinitHohs Relations & functions Sets and Th eir Repres entaton:- first, We examine the following ole cHions: ci odd Natural Number less than lo e 1, 3, 5.t,q (ii) The river Indio. (jii) The Vowels in the English alphabet.nomee a, e, .o. .
(iv) Various Kind ttianglas (V) Prime factor 210 . namely 2.3,s. (vi) The Solution the equahon -5et 6-o , viz. 2 and 3 each d the above exambl is well defined Collechon obgect Sa that P Set is is well-defined Collection objects. "" The dolowing point may be hoted element.and members a Sef are Syhonymous term dlenoted by Capital Lafcs A, 8, x y etc (ii) Sets are.usu ii) The clement a Set repre sented by Smale eHcrs
If 'a' is an element a Set A..we say that . a belangs to A the (nreck SymboL E (ebslJon) Is used to dehotethe phrase, ' belangs to, . Thus we urite EA . %" is not an element a Seh A, we write b EA and reod b does not belong to A to. Thus We write a EA * Feu) more exambR2 Sets:- N : The Set g all Natural Number : The Set a01 ntegers Q ; The Set an Rahonal Numbers. R : The Set Reae Numbers. eS.
Z The Set g posihive thlegers : The Sety positive Rational numbers. R" : The Sef positive Real Numbers. k There are two mcthods d Repre sentat'ng a Sefs Ci) Roste or tabular form (i) Set builcler form 1n Roster dorm, all the elaments of a Set are Risted, the elements are being seperafed by Commas ond enclesed within braces
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B.Sc.(H) Mathematics from Delhi University, Qualified IIT JAM & NBHM. Exploring new things, Love being around children and helping kids.