Question

Write the following in roster form and determine its cardinality A={x:x is a multiple of 6 less than 18} *

A=(1,6,12,18); n(A)=4

A=(6,12); n(A)=2 (this is the correct answer but I need working of it to show how I got the answer, I really need help with it, please upload the working fast, I'll follow and mark brainly)

A=(6,12,18);n(A)=3


please I beg​

Answer 1

Answer :-

A={x:x is a multiple of 6 less than 18}

Roster form : A = (6,12)

Explanation :- As 6 and 12 are multiple of 6 and less than 18

Cardinality : n(A) = 2

Explanation :- As there are only 2 elements in above set [A=(6,12)]

Hope it's helpful