Skip to content
Proofy runs its lessons in your browser, so it needs JavaScript. Please turn it on and reload.
✕
Exit
Lesson 034 · Step 1 of 2
Streak 00
What does
x
∈
A
∩
B
x \in A \cap B
x
∈
A
∩
B
mean?
A
x
∈
A
x \in A
x
∈
A
but
x
∉
B
x \notin B
x
∈
/
B
B
x
∈
A
x \in A
x
∈
A
or
x
∈
B
x \in B
x
∈
B
C
x
∈
A
∪
B
x \in A \cup B
x
∈
A
∪
B
D
x
∈
A
x \in A
x
∈
A
and
x
∈
B
x \in B
x
∈
B