Proof - Natural Numbers - Prove the following conjectures, that for all N in the set of Natural Numbers...
Question continued in attachment.
Prove: Set Theory, closed sets and compact sets - I would like to know how to construct a proof of union/and of 2 closed sets and how to prove compact sets.
(See attached file for full problem description)
---
a. Let E and F be closed sets in ...
Proof/logic - To prove a statement "If P then Q", it is valid to prove which of the following statements instead?
A. If not Q then not P
B. If Q then P
C. If not P then not Q
D. Q only if P
E. Both P and Q are ...
Set Theory - I would like to know how to prove sets involving intersection/union.
(See attached file for full problem description)
Proving composite - Prove, using the given method, that 561 is composite.
(See attached file for full problem description)