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Jan
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awarded  Popular Question
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Dec
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reviewed Approve How to demonstrate if H is a subspace?
Dec
14
comment How to demonstrate if H is a subspace?
Yes, I think I can do that but I only have one vector, whats is the other vector $v$ ?
Dec
14
asked How to demonstrate if H is a subspace?
Sep
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Jun
26
accepted Understanding Riemann sums
Jun
26
comment Understanding Riemann sums
Shouldn't be each points $iΔx$ for the right point and $(i-1)Δx$ for the left one instead $\frac{i}{n}$ ? I don't understand that :/ By the way very nice explanation :)
Jun
26
comment Understanding Riemann sums
Thank you :) I understand what you are saying. But my $f(x) = \sqrt{x}$ That's why I don't understand why it is $\frac{i^2}{n^2}$ unless my book had an error. I understand that Riemann is: $$\sum_{i=1}^n f(C_i)Δx$$ But the divisions in n intervals of the funtion are not neccessarily equal.
Jun
26
comment Understanding Riemann sums
$C_i$ is each point on the x axis. $C_i(right)$ is the right point of a rectangle and $C_i(left)$ is the left point
Jun
26
awarded  Editor