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seen Oct 2 at 9:53

Jul
2
awarded  Curious
Jun
29
accepted Can this be simplified?
Jun
29
comment Can this be simplified?
how did -4/3 become 2/3 ?
Jun
29
asked Can this be simplified?
Jun
27
accepted Is this fourier even?
Jun
11
awarded  Popular Question
Jun
11
comment Is this fourier even?
ok it is becoming more clear. The problem was that I heard other students saying that teacher told that it isnt even and that they have found a $b_n$ after many computations
Jun
11
comment Is this fourier even?
so is it safe to say $b_n=0$ and for $a_n$ calculate $2 \int_0^{pi}f(x)dx$ ?
Jun
11
comment Is this fourier even?
@M.Vinay I know that b_n is zero for even function but because this isnt even at x=0 but $f(x)=f(2π−x)$ me an other students had trouble with that.
Jun
11
comment Is this fourier even?
the question is if we can conclude that $b_n =0$ without calculating it. and since domain isnt at -pi,pi how can we tell
Jun
11
comment Is this fourier even?
fourier $b_n$ == 0 too?
Jun
11
accepted Local max/min of this
Jun
11
asked Is this fourier even?
Jun
10
comment How is $2\sum_{n=2}^{\infty}\frac{1}{(n-1)(n+1)}=\frac{6}{4}$ calculated?
i cant get that result
Jun
10
asked How is $2\sum_{n=2}^{\infty}\frac{1}{(n-1)(n+1)}=\frac{6}{4}$ calculated?
Jun
9
revised Local max/min of this
deleted 1 character in body
Jun
7
comment Local max/min of this
maybe there is something wrong with problem then. using lagrange multipliers I can find x=y and $x=\sqrt{2}/2$ but then I cant find λ. For λ=0 I get Det =0 meaning no solution
Jun
7
comment Local max/min of this
it makes sense and helps to verify. But what I was looking was Lagrange , Lagarde method.Maybe it isnt possible ?
Jun
7
comment Local max/min of this
yep but seems hard to solve the system
Jun
7
comment Local max/min of this
I have a limitation (dont know how it is called) $x^2 + y^2 -1=0$ I know the theory but at this example seems difficult for me to apply it.