Question

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Answer 1

Are you sure this is math?

Answer 2

pretty sure
do you know how to read the symbol \(\forall\)?

Answer 3

Hint:
Z=set of integers
Q=set of rational numbers
Once you complete (a), (b) can be obtained by replacing x\(\in\)Q by Ratl(x) and similarly x\(\in\)Z by Int(x).

Answer 4

∀ means 'for all' i believe

Answer 5

so for all x, if x is an integer, then x is rational

Answer 6

what about the 2nd part

Answer 7

but there exists ?

Answer 8

I guess they are trying to say some integers are not rational numbers there but I dont see how in that sentence structure..

Answer 9

for all x, if x is an is an element of z(integer), then x is Q(rational), but there exist some x element of Q, such that x is not an element of Z

Answer 10

thanks man