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Apr
29
accepted How to count the number of x in a rows in a larger set.
Apr
29
asked How to count the number of x in a rows in a larger set.
Feb
11
accepted Multiplying inverse matrices easily.
Feb
11
comment Multiplying inverse matrices easily.
Can you possibly explain why the order of B and A is switched around?
Feb
11
comment Multiplying inverse matrices easily.
@G.Sassatelli So it would not work?
Feb
11
asked Multiplying inverse matrices easily.
Sep
21
comment Solving the recurrence $a_n=2a_{n-1}-a_{n-2}$
$a_2 = 2*1-0 = 2$.. $a_3 = 2*2-1 = 3$.. $a_4 = 2*3 - 2 = 4$.. So the pattern seems to be $a_n = n$?
Feb
23
awarded  Popular Question
Dec
9
awarded  Caucus
Nov
22
revised How to find probability?
Formatting, language, mathjax
Nov
22
comment How to find probability?
@alonsos I just put in an edit with proper formatting, just needs to be approved.
Nov
22
suggested approved edit on How to find probability?
Nov
18
comment Average number of tries to reach 5 successes.
Well I apologize for the misunderstanding then. Thank you.
Nov
18
comment Average number of tries to reach 5 successes.
Good answer, though 'And a failed flip when n=0' is wrong, you may have not seen the edit, but if n=0, the flip always succeeds.
Nov
18
comment Average number of tries to reach 5 successes.
I've edited question to reflect that.
Nov
18
revised Average number of tries to reach 5 successes.
added 153 characters in body
Nov
18
comment Average number of tries to reach 5 successes.
@AndréNicolas No, the lowest it goes is 0.
Nov
18
comment Average number of tries to reach 5 successes.
@Alistair The first coin, filling in the first blank that is at $1$ probability.
Nov
18
asked Average number of tries to reach 5 successes.
Oct
29
comment find the least positive residue of $1!+2!+3!+…+100!$ modulo each of the following integers
What do you mean.. residue?