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Jun
29
comment Can this be simplified?
how did -4/3 become 2/3 ?
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
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
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.
Jun
7
comment Local max/min of this
i have to solve without that
Jun
6
comment Improper integral comparison test
Where can I find texts about these tricks ?
Jun
6
comment Improper integral comparison test
if bottom $x^5$ was like $10x^5$ would it matter too ?
Jun
6
comment Improper integral comparison test
they are the same with the first. Integral from 1 to infinity
Jun
6
comment Improper integral comparison test
thanks didnt notice
Jun
6
comment Improper integral comparison test
why we dont keep 3 too then ? 3/4x ? Because it has lower power ?
Mar
13
comment Improper integral with parameter calculation
How did you find the asymptotic?
Feb
24
comment Find limit of this decreasing sequence
yep got it. How did you figure it out ? I am trying to find an explanation -am I retarded.
Feb
24
comment Find limit of this decreasing sequence
how do you get the first row ?