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 Nov24 revised How to prove the equation $\cos x=2x$ has only one solution? improve formating Nov16 answered Vector by integral, notation convention or mistake? Nov16 accepted Solving $y'' + (ax+b)y = 0$ Nov15 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. Nov15 asked Solving $y'' + (ax+b)y = 0$ Oct29 awarded Famous Question Oct29 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. Oct28 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. Oct27 awarded Popular Question Oct25 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. Oct25 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. Oct25 revised Suppose $S$ is a minimal surface, show that the gaussian curvative is negative on all interior points edited title Oct25 awarded Cleanup Oct25 revised Suppose $S$ is a minimal surface, show that the gaussian curvative is negative on all interior points rolled back to a previous revision Oct25 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 $x^2+x$? Oct25 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. Oct25 answered 3-D function that follows an inverse square law, but has an overall integral equal to a constant Oct24 awarded Yearling Oct15 revised What's the integral of $\frac{-4x}{1+2x}$? latex'd Oct15 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.