Question

Please help..

a) 7 ɛ {7,11,17}
b) 0 ɛ ∅
c) 7 ∉ {7}
d) {11} ɛ {11}


are they true or false?

Answer 1

a)

Is 7 in the set {7, 11, 17} ?

Answer 2

is it true, true, false, true?

Answer 3

a) \(7 \in \{7,11,17\}\)
read this as follows:
7 is an element of the set including 7,,11 and 17
t/f?

Answer 4

Everything but your answer for b is correct. Remember the empty set has nothing in it...not even zero.

Answer 5

ohh okay thank you!

Answer 6

so true, false, false, true? lol :)

Answer 7

\[0 \in ∅\]\[∅=\{\}\]

Answer 8

you got it

Answer 9

ohh gotcha!

Answer 10

thank you both!

Answer 11

\[o\cancel\in∅\]

Answer 12

you're welcome