9 Answered Questions for the topic Math Proof Help

Math Proof Help Logic Proofs Mathematics

12/08/18

How do I prove this statement using the axioms of integer arithmetic: If a < 0, b > 0, then ab < 0?
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Math Proof Help

06/09/18

Given line AP and AS are tangent to point O at P and S respectively. Prove line segment AO is perpendicular to line segment PS
How to solve geometry proof when determining two segments are perpendicular.
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02/13/18

Simplify using logic of laws, Question "~(~b∧a)∧(b∨a) "
~ mean not ^ mean and ∨ mean or   Help me pls
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Math Proof Help Discrete Math Proofs Proof

02/12/18

Prove by Induction question, 2+6+18+...+ 2.3^n-1 = (3^n)-1
Can anyone help me solving this problem, Im really really lost. Thank you
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02/12/18

Contradiction prove question, "Prove by contradiction that the difference between any odd integer and any even integer is odd"
How to do this, please help me. Thank you very much!
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02/12/18

Direct proof question, "The product of an even integer and an odd integer is even".
I didnt understand  Let say X = 2a +1 while y = 2b+1   Why you need to multiply xy rather x+y, as you can see below: XY = (2a+1)(2y+1) <- correct X+Y = 2a+1+2y+1 <- Incorrect   Can you... more
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01/30/18

Prove that sup(a, b)=sup[a, b]=b and inf(a, b)=inf[a, b]=a. Is completeness relevant?
Denoting, as usual, by (a, b) an ”open interval”, {x : a<x< b} and by [a, b] the corresponding ”closed interval”, {x : a≤x≤b} of real numbers, prove that sup(a, b)=sup[a, b]=b and inf(a,... more
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Math Proof Help Math Logic Proofs

01/25/18

Set Theory/Math Logic
Is there any way to prove that   - Every point in A intersect B is greater than or equal to 1?   - The intersection of two sets has a point in commonwith another set?   If there is no way to... more
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Math Proof Help

10/20/17

prove that x and y are even if 5x + y = 8
I have to prove that x and y are even if 5x + y = 8
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