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barrick
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barrick
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11-04-2017
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11-15-2017,
04:33 AM
barrick
replied to a thread
Deriving Function: Suppose g is real-valued differentiable fcn, |g'(x)| <= M
in
Calculus
Hi zeeskeys, If you could take \epsilon=0, then f(x)=x would be one-to-one and onto. In essence, you must prove that, by taking \epsilon small...
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1 replies | 113 view(s)
11-11-2017,
09:11 AM
barrick
replied to a thread
Probability Real Life Question
in
Probability / Statistics
Well, that's a good point. To do that, we would need an estimate of the probability of vacancy in each prison. As such information was not...
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3 replies | 274 view(s)
11-08-2017,
09:18 AM
barrick
replied to a thread
Probability Real Life Question
in
Probability / Statistics
You should look at the probabilty of "bad luck", i. e., the probability that all the 10 numbers are above 22. If that probability is p, the...
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3 replies | 274 view(s)
11-07-2017,
10:15 AM
barrick
replied to a thread
Using only the axioms of real numbers prove that 1/0 does not make sense
in
Calculus
Hi Aemilius, There are various ways to definie the real numbers axiomatically. However, as far as I know, all these definitions include the field...
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1 replies | 127 view(s)
11-07-2017,
09:51 AM
barrick
replied to a thread
"Find y and x such that by + ax = gcd(a,b) in the Gaussian integers"
in
Advanced Math
Hi ksdhart2, I notice that this question has been left unanswered for some time, and I don't know if you are still interested in the answer....
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1 replies | 287 view(s)
11-05-2017,
09:28 AM
barrick
replied to a thread
[Linear Algebra] Matrix "proof" type problem involving determinants ( I think)
in
Geometry and Trig
Hi malakai456, If, for example, B and C are invertible, then, by definition, they have inverses B^{-1} and C^{-1} (after all, that is what...
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1 replies | 221 view(s)
11-05-2017,
05:15 AM
barrick
replied to a thread
Coin toss probability: "There are 3 coins in a bag, 2 fair and 1 biased...."
in
Probability / Statistics
The result would be the same, as you would expect. There are three possible orderings for the outcome. If the coin is good, you will have a...
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2 replies | 229 view(s)
11-04-2017,
10:10 AM
barrick
replied to a thread
Recurrence relation for quaternary strings length n sum divisible by 3
in
Advanced Math
Hi sunrae, You are almost there ! You have (correctly) written: \displaystyle a_n = 2a_{n-1} + b_{n-1} + c_{n-1} You also know that:...
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1 replies | 174 view(s)
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About barrick
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About barrick
Biography:
Electronics Engineer
Location:
Brussels, Belgium
Occupation:
IT Project Manager (retired)
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8
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