Question

If C = {a, b, c, d, e, f, g, h, i} and D = {vowels}, what is C ∩ D?

{a, e, i}

{a, e, i, o, u}

{a, b, c, d, e, f, g, h, i, o, u}

{ }

Answer 1

c right?

Answer 2

actually all answers need to have empty set, right?

Answer 3

Its c then

Answer 4

http://www.proofwiki.org/wiki/Empty_Set_Subset_of_All

Answer 5

@RitaSweden
GIVE the man fish you feed him a day
TEACH the man to fish you feed him a lifetime

Answer 6

........

Answer 7

so a

Answer 8

Watch this: http://ocw.mit.edu/courses/physics/8-01-physics-i-classical-mechanics-fall-1999/video-lectures/

When u are stuck, watch PatrickJMT´s videos