13 Answered Questions for the topic Mathematical Proof
Mathematical Proof Geometry
09/13/18
Solve the equation. Write a justification for each step. −4= n+7 over 6
Need some guidance with this question. Thanks
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,...
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07/19/17
Trigonometry Proof
Please help me answer the following question! I'm stuck!
Prove that cos6ß + sin6ß = 1/4 + 3/4cos2ß
I've tried simplifying out the LHS into (cos2ß)3 + (sin2ß)3, but I don't know what to do...
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Mathematical Proof Algebra
03/21/17
Algebraic Proof question
a, b, c are positive integers such that a>b>c
N is the largest three digit number that has the digits a, b and c.
K is the smallest three digit number that has the digits a, b and...
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Mathematical Proof
03/05/17
let x be an irrational number. show that for every k>0 there exist n,m ∈Z such that 0<|nx-m|<k
Use direct proof or contrapositive proof or proof by contradiction
Mathematical Proof Mathematical Induction
12/29/16
n∑k=1,(2k^2-4k+3)=n/3(2n^2-3n+4),prove by mathematical induction.
I stucked with this after step one where u prove by substituting 1 into the unknowns.Do kindly assist.
11/28/16
Given: line WXY, m<WXZ = 135°. Prove: m<ZXY = 45°
Statements
line WXY
m<WXY = 180°
m<WXZ = 135°
m<WXY = m<WXZ + m<ZXY
180° = 135° + m<ZXY
45° = m<ZXY
m<ZXY = 45°
Reasons
Given
Defintion of supplementary...
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Mathematical Proof
11/20/16
Proof question: "Prove that if 𝑛 is an odd integer then ⌈ (2𝑛+1) / 2 ⌉ = 𝑛 + 1"
Am I wrong in thinking that the 2's in the numerator and denominator should cancel each other out, leaving me with ⌈𝑛+1⌉= n + 1, and because n + 1 is an integer, that it's ceiling is simply n + 1?...
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Mathematical Proof
10/14/16
Prove, 1/n ? n - 1
Prove or disprove. For all n in rational, 1/n ≠ n - 1
Mathematical Proof
10/14/16
if n is not divisible by 3, then n 2 + 2 is divisible by 3
Prove or disprove the statement
if n is not divisible by 3, then n 2 + 2 is divisible by 3
04/12/16
Prove formula for sum of Fibonacci sequence numbers by mathematical induction.
We need to prove the following using proof by induction. I don't want the actual answer if you can avoid it, I just can't figure out how to do it because when I do it how my notes read I am...
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02/05/16
Prove Statement using the First Principle of Mathematical Induction
Prove the following statements using the First Principle of Mathematical Induction:(a) If r ≠ 1, then1 + r + r2 + ... + rn = (1 − rn+1)/(1-r)
for all n ∈ N. Why does the formula not work when r =...
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11/19/15
Proof by induction.
Proof by mathematical induction that for every integer h ≥ 0 there exists binary tree of height h with 2h leaves.
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