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Questions
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How to isolate $f(x)$ in $f(x+a)=f(x)+a\times g(x)$?

nov 2 11 at 2:54 Barry Cipra 3,204●1●8●18

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0
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477
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How to find the sum? [closed]

nov 15 11 at 1:27 GarouDan 31●4

 
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1
answer
475
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Matrices. $XX^t=A$. $X=?$

nov 7 11 at 7:03 Brendan McKay 9,111●1●13●33

 
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396
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Odd perfect numbers. What’s the best progess we now about them? [closed]

oct 31 11 at 14:08 GarouDan 31●4

 
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0
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366
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How to prove? Prime numbers. [closed]

nov 2 11 at 15:42 GarouDan 31●4

 
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2
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224
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Summing a function using modulus. [closed]

nov 28 11 at 16:32 GarouDan 31●4