JEE RANKERS Series Day 1 40 DAYS JEE MIN Mathematics

SETS SET : A set is a collection of well defined objects which are distinct from each other Set are generally denoted by capital letters A, B, C,... etc. and the elements of the set by a, b, c. etc. If a is an element of a set A, then we write a e A and say a belongs to A. If a does not belong to A then we write a e A eg,. The collection of first five prime natural numbers is a set containing the elements 2, 3, 5, 7, 11.

SOME IMPORTANT NUMBER SETS N Set of all natural numbers WSet of all whole numbers Z or I set of all integers Z Set of all tve integers Z Set of all -ve integers Zo The set of all non-zero integers.

Q The set of all rational numbers. 20 R the set of all real numbers R-Q The set of all irrational numbers e.g. 12. v13 , 15. , e, log2 etc. are all irrational numbers. METHODS TO WRITE A SET: () Roster Method : In this method a set is described by listing elements, separated by commas and enclose then by curly brackets e.g. The set of vowels of English Alphabet may be described as a, e, i, o,u)

(l) Set Builder Form : In this case we write down a property or rule p Which gives us all the element of the set A={x : P(x)) A={x : x e N and x = 2n for n e N} A12, 4,6, e.g. i.e. e.g i.e

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Jatin Chaudhary

4 months ago

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Saga raga

3 months ago

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Vivek Kumar Pandey

3 months ago

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Vivek Kumar Pandey

3 months ago

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