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FactChecker's latest activity
FactChecker
replied to the thread
Rationalize the denominator: ##\sqrt{\dfrac{1}{2x^3y^5}}##
.
I'm sorry. I misstated. ##\sqrt {\frac {1}{2x^3y^5}}## should always be positive, when it is defined. (I am assuming that your class...
Yesterday, 11:18 PM
FactChecker
reacted to
pbuk's post
in the thread
Comp Sci
Which is the probability of JohnCalls given Burglary? Why?
with
Like
.
You have four numbers representing the probabilities of all of the possible combinations of events where J is true, given that B is...
Yesterday, 6:47 PM
FactChecker
reacted to
alima's post
in the thread
Comp Sci
Which is the probability of JohnCalls given Burglary? Why?
with
Like
.
Oh, now I understand why use the Truth Table! 0.00171 + 0.844308 + 0.000005 + 0.002994 = 0.849017 Thank you for all the help.
Yesterday, 6:47 PM
FactChecker
reacted to
Hill's post
in the thread
Finding general solution to linear system
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Like
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Eigenvectors are non-zero vectors by definition. Zero vector satisfies ##Ax=\lambda x## for any ##A## and any ##\lambda##.
Yesterday, 5:46 PM
FactChecker
replied to the thread
Rationalize the denominator: ##\sqrt{\dfrac{1}{2x^3y^5}}##
.
No, because your final answer would be negative if exactly one of x or y were negative. The original fraction is always positive. That...
Yesterday, 5:42 PM
FactChecker
reacted to
fresh_42's post
in the thread
Rationalize the denominator: ##\sqrt{\dfrac{1}{2x^3y^5}}##
with
Like
.
The original expression is positive, so there is no way to end up with negative values. If so, then it should be ##|y^3|##.
Yesterday, 5:40 PM
FactChecker
replied to the thread
What does a row matrix represent geometrically?
.
None that stand out from the others. You should know that there are a great variety of uses and interpretations of different types of...
Yesterday, 5:34 PM
FactChecker
replied to the thread
Critical points of matrix
.
Mathematics is very unforgiving in many ways. It's a learned skill to review your work very carefully. You did a good job! The problems...
Yesterday, 12:04 PM
FactChecker
reacted to
TanWu's post
in the thread
Critical points of matrix
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Like
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Thank you Sirs. I apoglize, that is a typo of me. Yes, got the initial problem equations correct. I was only expecting one critical point.
Yesterday, 12:00 PM
FactChecker
replied to the thread
Critical points of matrix
.
Do you mean ##-2x + 4y = 0## here? Your work looks ok to me. If you have doubts, have you checked that you got the initial problem...
Tuesday, 11:24 PM
FactChecker
replied to the thread
Comp Sci
Which is the probability of JohnCalls given Burglary? Why?
.
I should say that the alarm probabilities creates a dependence between (burglary,earthquake) and (JohnCalls, MaryCalls, nobody calls).
Tuesday, 4:17 PM
FactChecker
replied to the thread
Comp Sci
Which is the probability of JohnCalls given Burglary? Why?
.
Good catch! I didn't realize that the probabilities of the alarm might create a dependence between (burglary,earthquake) and (JohnCalls...
Tuesday, 4:04 PM
FactChecker
reacted to
Mark44's post
in the thread
Comp Sci
Which is the probability of JohnCalls given Burglary? Why?
with
Like
.
I don't know whether you can disregard earthquake events. P(A) = .95 if both burglary and earthquake are true, but P(A) = .94 if only a...
Tuesday, 4:00 PM
FactChecker
replied to the thread
Comp Sci
Which is the probability of JohnCalls given Burglary? Why?
.
There is an important point that you need to notice. According to that diagram, the event of who calls is independent of whether the...
Tuesday, 2:29 PM
FactChecker
replied to the thread
What does a row matrix represent geometrically?
.
You should first say that, you are using the matrix, ##M##, as a multiplier on the left of a vector, ##\vec{v}##: ##M \vec{v}##, rather...
Tuesday, 11:48 AM
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