Question

J={x:x=1/n,n belongs to N ,4

Answer 1

Answer:—

Given set builder form of a Set is

→ J={x:x=1/n,n belongs to N ,4}

Here,

→ n is natural number less than 4

→ n={4}

Given,

→ x = 1/n - 1

→ If n = 4 then x = 1/4 - 1 = 1 - 4/4 = -3/4

Roster form the seset

$\blue {\{ \frac{ - 3}{4} \}}$