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location Buenos Aires, Argentina
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Nov
16
accepted Solving $y'' + (ax+b)y = 0$
Nov
15
comment Solving $y'' + (ax+b)y = 0$
Side note; how do I make the expression for $\phi(k)$ look nice? The symbols look extremely small to me.
Nov
15
asked Solving $y'' + (ax+b)y = 0$
Oct
29
awarded  Famous Question
Oct
29
comment can not find the proof that logarithms are the inverse of exponentials
What's your definition of both? People usually define one of those to be the inverse of the other.
Oct
28
comment What situations/models require calculating the area under a curve?
Are you asking specifically about finding the area below a curve, or about integrating in general? Because there is an endless list of uses for the latter.
Oct
27
awarded  Popular Question
Oct
25
comment Suppose $S$ is a minimal surface, show that the gaussian curvative is negative on all interior points
I just clicked "edit" and then "roll back" on the first revision, if that's what you're asking.
Oct
25
comment Suppose $S$ is a minimal surface, show that the gaussian curvative is negative on all interior points
I rolled the question back to what it was originally. You should probably add a disclaimer to your answer so people don't start downvoting you.
Oct
25
revised Suppose $S$ is a minimal surface, show that the gaussian curvative is negative on all interior points
edited title
Oct
25
awarded  Cleanup
Oct
25
revised Suppose $S$ is a minimal surface, show that the gaussian curvative is negative on all interior points
rolled back to a previous revision
Oct
25
comment Suppose $S$ is a minimal surface, show that the gaussian curvative is negative on all interior points
Also, what sort of course are you following that you can talk about minimal surfaces but don't know the derivative of $x^2+x$?
Oct
25
comment Suppose $S$ is a minimal surface, show that the gaussian curvative is negative on all interior points
Please don't change your question to something else. If you have a new question, ask a new question.
Oct
25
answered 3-D function that follows an inverse square law, but has an overall integral equal to a constant
Oct
24
awarded  Yearling
Oct
15
revised What's the integral of $\frac{-4x}{1+2x}$?
latex'd
Oct
15
comment What's the integral of $\frac{-4x}{1+2x}$?
Constants don't matter when doing integrals. In this case, the $-1$ gets absorbed into the $+C$ that you should have put when doing the integral.
Oct
14
answered Integration by parts: $\int xe^{-x}dx$
Oct
14
comment How do we explain to students that division by a vector does not make sense?
It certainly depends on what your multiplication is.