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 Dec24 awarded Yearling Sep30 awarded Explainer Sep24 awarded Autobiographer Dec25 comment On “familiarity” (or How to avoid “going down the Math Rabbit Hole”?) I too have had difficulty getting any traction on new areas from sources such as Wikipedia, and moreover am frustrated to see areas I do know explained in ways that will not help a beginner. For an autodidact, sources of free online textbooks are valuable; reddit.com/r/mathbooks is one place to start. Dec24 awarded Yearling Dec14 comment $x$ values for $2x + |x| = 3 + |x+1|$ It is OK to leave work for the reader, but you need to state you have not completed the problem lest the OP think you have demonstrated a complete solution. Dec13 comment Determinate a continuous function given a few coordinates. I also like rational polynomials for practical work. They keep the degree of the polynomial down so they are easier to invert, and often the singularity is outside the region of interest, or is a feature of the function you are fitting to. Dec13 comment Determinate a continuous function given a few coordinates. Write a general polynomial of degree one less than the number of points, then create a system of n equations which are the polynomial evaluated at each point. Then solve the system of equations to get the polynomial coefficients. Dec13 answered $x$ values for $2x + |x| = 3 + |x+1|$ Dec10 answered Values of a, b, and c that the curve $y = ax^3 + 3x^2 + bx + cx + e^x$ has one point of inflection? Dec10 comment Values of a, b, and c that the curve $y = ax^3 + 3x^2 + bx + cx + e^x$ has one point of inflection? Given that $e^x$ is positive will drive you to a negative x. Since it won't be too small you can probably use an estimate for $e^x$ around that x. Dec4 answered Does every record of the arithmetic derivative of natural numbers occur at a practical number? Dec4 awarded Custodian Dec4 reviewed Reviewed Optimization Word Problem, revenue Dec2 comment Does every record of the arithmetic derivative of natural numbers occur at a practical number? For a moment I thought they might be products of primorials (oeis.org/A025487) which is a tighter restriction, but 640 is the first one that is not. I'll have to keep thinking about it. Dec2 answered Positively non-positive (from Brilliant.org) Whats wrong with my method? Nov28 comment Trigonometry triangles Did you use c = - 17,500? I get two solutions, around F = 67 and F = - 260, which both work in the original equation. Nov28 comment Can we determine which statements are incomplete due to Godel? Thanks for the clarification. Nov28 accepted Can we determine which statements are incomplete due to Godel? Nov28 comment Can we determine which statements are incomplete due to Godel? So I understand your answer as: Yes, it is possible that any of these conjectures are true but unprovable, and No, we cannot know which questions are the unprovable ones.