Describe the following set in Roster form : (i) {x:x is a letter before e in the English alphabet}. (ii) {x∈N : x^2 < 25}. (iii) {x∈N : x is a prime number, 10 < x < 20}. (iv) {x∈N : x = 2n, n∈N}. (v) {x∈R:x greater than x}. (vi) {x:x is a prime number which is a divisor of 60}. (vii) {x: x is a two digit number such that the sum of its digits is 8). (viii) The set of all letters in the word 'Trigonometry'. (ix) The set of all letters in the word 'Better'.

Describe the Following Sets in Roster Form

Question	Roster Form
(i) \[ \{x:x \text{ is a letter before e in the English alphabet}\} \]	\[ \{a,b,c,d\} \]
(ii) \[ \{x\in N:x^2<25\} \]	\[ \{1,2,3,4\} \]
(iii) \[ \{x\in N:x \text{ is a prime number, }10	\[ \{11,13,17,19\} \]
(iv) \[ \{x\in N:x=2n,n\in N\} \]	\[ \{2,4,6,8,10,\ldots\} \]
(v) \[ \{x\in R:x>x\} \]	\[ \phi \]
(vi) \[ \{x:x \text{ is a prime number which is a divisor of }60\} \]	\[ \{2,3,5\} \]
(vii) \[ \{x:x \text{ is a two digit number such that the sum of its digits is }8\} \]	\[ \{17,26,35,44,53,62,71,80\} \]
(viii) The set of all letters in the word “Trigonometry”	\[ \{T,r,i,g,o,n,m,e,t,y\} \]
(ix) The set of all letters in the word “Better”	\[ \{B,e,t,r\} \]

Spread the love

Describe the Following Sets in Roster Form