147 Answered Questions for the topic discrete mathematics
show that R x Zn has an identity element.
Ideal and subring
Recursion and Recurrence Relations (Home Work)
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Expected Value + Probability
Seating arrangements of 7 boys and 5 girls in a row.
Let p be a odd prime, If ord p (a) = h and h is even, then a^(h/2)= -1 mod p
10 Very challenging proof: Prove that for every natural number n, cos(nx) can be expressed as a polynomial in cos(x) of degree n
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prove that there does not exist n belongs to N such that n congruent 2 (mod 4) and n congruent 4 (mod 8)
Let n belong N. Define r:N2n --> N2n by r(x)= x+1 if x is odd, r(x)= x-1 if x is even. Prove that r is a bijection.
convert (7A3E)16 to binary
Prove that the function f : Z ? N defined by f(x)=(|4x+1|+1)/2 is injective
For all real equations, prove f is decreasing if -f is decreasing
Probability of winning a laptop?
Proof by induction.
Proof by mathematical induction.
What is the minimum height height of a full binary tree?