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Jun
1
comment Determinant of block tridiagonal matrices
Interesting question. How did you get this kind of matrices?
May
19
awarded  Popular Question
Apr
25
comment How to find linear equation from text
solve the system of linear equations by using your two given Points
Apr
20
revised Find the max and min of $f(x) = x^5 -x^4+x^2-x$
added 2 characters in body; edited title
Apr
20
reviewed Approve Finding local maximum and minimum
Apr
18
comment maximum area of semi-circle in square
Thanks a lot for the answer.
Apr
18
accepted maximum area of semi-circle in square
Apr
18
asked maximum area of semi-circle in square
Dec
23
awarded  Constituent
Dec
9
awarded  Caucus
Dec
3
comment Isosceles triangle and scalene triangle
Use Heron formula: $A=\sqrt{s(s-a)+(s-b)+(s-c)}$ and $2s=a+b+c$.
Nov
17
comment Conditional Expectation Question from Grimmett & Stirzaker 1000 exercises in probability
What's the definition of $E(X|Y)? Plug in your conditions.
Oct
2
accepted Application of Desargues' theorem for constructions
Sep
30
awarded  Explainer
Sep
19
comment Application of Desargues' theorem for constructions
Opening two questions for the same topic isn't appropriate
Sep
19
asked Application of Desargues' theorem for constructions
Sep
17
comment Integral of $x^x$
use $y=x^x$ (there is no closed form)
Jul
23
awarded  Yearling
Jul
6
comment Solving congruences
@JoeJohnson126 because 7 is not equivalent to 1 mod 5 (congruence II)
Jul
6
comment Solving congruences
Thanks, with necessary/sufficient it seems quite logical. Thanks a lot.