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প্ৰস্তাৱনা - Preliminaries - BA 1st SEM - Under Dibrugarh University

  প্ৰশ্নাৱলী(EXERCISE) 1. Express the following sets by the rule method. (i) P = {2 , 4 , 6, 8 ,....} (ii) Q = {.... -4, -2, 0, 2, 4, ....} (iii) R = ф Solution:  (i) P = {x /x is an set of even number } P = {x /x এটা যুগ্ম সংখ্যাৰ সংহতি } (ii) Q = {x / x is a set of even integer } Q = {x/x এটা যুগ্ম অখণ্ড সংখ্যাৰ সংহতি } (iii) R = { x / x is a void set } Q = { x/x এটা ৰিক্ত সংহতি} 2. Express the elements of the following sets by Roster Method: (i) N = {x/x is a natural number} (ii) A = {a /a є N , a ≤ 6 } (iii) V = {a : a is vowel of the English Alphabet} Solution:  (i) N = { 1, 2, 3, 4, ... } (ii) A = { 1, 2, 3, 4, 5, 6} (iii) V = { a, e, i, o u} 3. State in words: (i) A = { x / x has Property P} (ii) W = {x /x is a number of days in a week } (iii) P = { x / x ε N } (iv) P = { x / x is an Indian Woman President} Ans:  (i)  (ii) W = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday , Saturday} (iii) P = { 1, 2, 3, 4,....} (iv) W = { Pratibha Dev isingh Patil, Droupadi Murmu } 4. R
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