Let M(x, y) be \"x has sent y an e-mail message\" and T(x, y) be \"x has telephoned y, \" where the domain consists of all students inyour class. Use quantifiers to express each of thesestatements.
g. There is a student in your class who sent every one else inyour class an email message.
I answer  ∃x( x ≠y ∧ ∀? M (x, y) )
But answer on text book is  ∃x( x ≠y → ∀? M (x, y))
i. There are two different students in your class who fave senteach other e-mail messages.
I answer ∃x∃y( x ≠y→ ∀? (M (x, y) ∧ M( y, x)))
But answer on text book is ∃x∃y( x ≠y ∧ ∀? (M (x, y) ∧ M( y,x)))
I am confused about the use of → and ∧ on almost all thequestion.
Can someone explain two differences here, and perhaps explain itby translating to English?
