Question

Find n(A) for the following set A.
{x:x is a letter in the word defenselessness}

Answer 1

n(A) is math notation which means "number of elements in set A"

Answer 2

example: if A = {1, 2, 3, 7} then n(A) = 4 because there are 4 numbers in that set

Answer 3

oh so all the letters except repeated letters

Answer 4

\(\checkmark \)

Answer 5

so 6 elements

Answer 6

Yeah all the unique letters. I'm counting 6 unique elements as well

Answer 7

wow that was simple lol, thanks guys, big help THUMBS UP ;)

Answer 8

I forgot to mention that you toss out repeated elements of a set, but it seems like you already knew that. So that's good