Question

Write the following sets in the set – builder form. 

i) {3, 6, 9, 12} 

ii) {2, 4, 8, 16, 32} 

iii) {5, 25, 125, 625} 

iv) {1, 4, 9, 16, 25, …, 100}

Answer 1

i) A = {x : x is multiple of 3 and less than 13} 

ii) B = {x : x = 2^p , 0 < P < 6, P ∈ N} 

iii) C = {x : x = 5^p , 0 < P < 5, P ∈ N} 

iv) D = {x : x = P² , 0< P < 11, P ∈ W}