Question

Write the given set in roster form and its cardinal number
A = {x:x = nbyn+2‚n€N and n<6}​

Answer 1

Answer:

ANSWER

x=3n

x=3nwhere n is a natural number and n<8

x=3nwhere n is a natural number and n<8So, n can be any digit from 1,2,3,4,5,6,7

x=3nwhere n is a natural number and n<8So, n can be any digit from 1,2,3,4,5,6,7So, in roster form

x=3nwhere n is a natural number and n<8So, n can be any digit from 1,2,3,4,5,6,7So, in roster formA={3,6,9,12,15,18,21}

x=3nwhere n is a natural number and n<8So, n can be any digit from 1,2,3,4,5,6,7So, in roster formA={3,6,9,12,15,18,21}Cardinal number = no. of distinct elements in the Set=7