MATHEMATICS FOR CLASS XI CHATTER-7 SETS 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,

Equal. Set: Qa Ser niven two Sef A and B i eve ele ment A is also an element Band every clement g B is aoso an element A . then the sct A and B are said , i to be equal. ciary the two sef have exactly the Same elament Detinithon: Two Set A and B are Said to be equali e exactly the Same elements and we rite crwisc the Set are said to be unequal and we wtite A B

Note: A Set cloes not change it one or more elements repeated. for ex the set are , the Se+ P =11, 2.31 ahcl 8= { 2 , 2, 1, 3 . 3 } are equal , since each element A is B and vice- versa EX, which the eMs uing pair sets are equal ? (i) X, the set d etcs in ALLOy'anc B, the set attcrs in LoyA L and B- {x :

Solution : 0 , y } 8-LL,ON,AL} { A, Then X and B are equal Se as re petition ) we have L ,L. and element in a Set do not change a Set. Thus . Since o Ep. but o 8 Hencc A and B ane not equal Set

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Upendra

B.Sc.(H) Mathematics from Delhi University, Qualified IIT JAM & NBHM. Exploring new things, Love being around children and helping kids.

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