Question

find the cardinal number for the given set A = {6, 8, 10,…. 30}

Answer 1

Step-by-step explanation:

This is an arithmetic sequence with first term 6 and common term

so it follows that by the nth term of an arithmetic series formula, 30=6+2(n-1)

24=2(n-1)

12=n-1

n=13

since there are 13 numbers in the set, the cardinal number is 13.