Mathematics
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Brian Drake
  • Member for 1 year, 8 months
  • Last seen more than a month ago
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25
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3
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3
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19
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3
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12
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2
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12
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12
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All Questions Answers
Score Newest
answer
2
Is this considered a valid proof that, if $A$ and $I+AB$ are invertible, then so is $I+BA$, and $(I+AB)^{-1}A=A(I+BA)^{-1}\,?$
Nov 4, 2020
answer
2
Probability of breast cancer
Nov 10, 2020
answer
2
If sum of triangle angles is $180$ degrees, how $\sin(270)$ is possible?
Nov 13, 2020
answer
1
proof for that exactly one normal can be drawn to a parabola from an exterior point.
Nov 1, 2020
answer
1
Proving a piecewise function is discontinuous at a point
Nov 2, 2020
answer
1
Graphing $f(2-x)$
Nov 3, 2020
answer
1
Generalize a sum given first elements
Dec 14, 2020
answer
1
How to find the center of a circle, given a point on the circumference of the circle, radius and arc length?
Mar 10, 2021
answer
1
Prove that limit does not exist using delta-epsilon
Mar 29
answer
1
Probability of spelling IDAHO correctly
Mar 29
Top Meta posts
1
1
3
How does this suggested edit “address the author of the post”?
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62
Why are low pass rates (below 50%) for exams considered acceptable in Germany?
31
Can I use GPL software to provide a commercial cloud service?
16
Is this a Bitcoin scam?
16
Can mean be less than half of median if all numbers are non-negative?
13
Is there a file that will always not exist?

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