Prove statement using formulas and then using a counting argument.
15666
explanation for a combinatorial identity involving the binomial coefficient
74523
Proof by Cases involving divisibility
136700
Proving divisibility of expression using induction
103347
combinatorial proof of summation
18301
Proof by Induction involving Inequality and Factorials as denominators
48606
Help with a Predicate Logic homework proof
19326
What makes induction a valid proof technique?
125028
Prove the following equality using mathematical induction:
77286
Proving set theory question
140167
Proving $A+A'B=A+B$ without truth tables
116978
Trying to prove $p,p \to (r \to q) \vdash (\neg q \to \neg r)$ by using natural deduction.
59280
Need help with Proof by Strong Induction question
158016
Help understanding predicate logic question/proof
131873
Getting better at proofs
51877
Why is this 'Proof' by induction not valid?
135509
Proof writing: how to write a clear induction proof?
131132
Proofs using vector properties