Joni
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 Jan2 comment Find quadratic equation based on 2 tangents In comments below you say you are looking for a parabola, and not just any quadratic equation. Do you have any limitations or preferences on the kind of a parabola, for example if its axis should be parallel to the X or Y axis? Jan2 comment Find quadratic equation based on 2 tangents Yes, I realised the wording was unclear. Jan2 comment Find quadratic equation based on 2 tangents This question appears to be off-topic because it is about mathematics. Questions on Stackoverflow should be at least tangentially related to computer programming. Oct23 comment Countability of polynomials Each polynomial has a unique representation in the suggested scheme because each integer has a unique representation in base 10. May31 comment What will happen if I try to print an impossible solid into a 3D printer? "closed as not constructive" How appropriate :D Mar17 comment One to one and onto Neither of those are functions by the regular definition. The first one defines several mappings for one value, and the second doesn't define a mapping for 3. Mar17 comment Area enclosed between the curves $y=x^2$ and $y=60-7x$ The area is between 810 and 820. If you show your work someone can help you spot the mistake. Mar16 comment Function of $\sqrt{2+\sqrt{2+\sqrt{2+}}}\ldots$ Why do you want to put it into a summation form? If you want to evaluate it a recurrence formula such as $x_{n+1} = \sqrt{2+x_n}$ is probably more fruitful. Mar14 comment What was the first bit of mathematics that made you realize that math is beautiful? (For children's book) @integral, don't underestimate a child's will to learn. I was exposed to fractals when I was 12-13 and was compelled to understand how they worked. That meant learning complex numbers and differential equations many years before my peers. Feb14 comment Generate unique integer from $n$ integers and solve to get the integers from result By "in order" do you mean that $n_i < n_{i+1}$ ? Jul5 comment Proving that an expression divides a number The second term in the sum is $3(n+1)(n+2)$. To show that it's divisible by 6 they need to show that $(n+1)(n+2)$ is even and then they substitute $(n+1)(n+2) = 2k'$. Jan26 comment clarification on the definition of group What are subgroups then ? The excercise must have a mistake.