NCERT Solution Class XI Mathematics Sets Question 1 (Ex 1.3)

Question 1:

Make correct statements by filling in the symbols ⊂ or ⊄ in the blank spaces :

(i) {2, 3, 4} … {1, 2, 3, 4, 5}

(ii) {a, b, c} … {b, c, d}

(iii) {x: x is a student of Class XI of your school} … {x: x student of your school}

(iv)  {x: x is a circle in the plane}  …  {x: x is a circle in the same plane with radius 1 unit}

(v) {x: x is a triangle in a plane}…{x: x is a rectangle in the plane}

(vi) {x: x is an equilateral triangle in a plane}… {x: x is a triangle in the same plane}

(vii) {x: x is an even natural number} … {x: x is an integer}

Answer

(i) {2, 3, 4} ⊂ {1, 2, 3, 4, 5}

(ii) {a, b, c} ⊄{b, c, d}

(iii) {x: x is a student of class XI of your school}⊂ {x: x is student of your school}

(iv)  {x:  x is a circle in the plane}  ⊄  {x: x is a circle in  the same plane with  radius 1 unit}

(v) {x: x is a triangle in a plane} ⊄ {x: x is a rectangle in the plane}

(vi) {x: x is an equilateral triangle in a plane}⊂ {x: x in a triangle in the same plane}

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