Amzoti
Reputation
645
Next privilege 1,000 Rep.
Create new tags
 Jan 4 awarded Good Answer Nov 20 awarded Explainer Aug 26 awarded Yearling Aug 26 awarded Yearling Aug 26 awarded Yearling Sep 28 comment Does $f(x)=x^3+2x+\tan x$ have any local maximum or minimum values? Justify your answer. Did you plot the function and then use the methods you are learning in Calculus to at least get you going? Start with a plot using wolframalpha. Sep 28 comment What is the most effective way of teaching mathematics to my 7 year old kid? There are also sites like this to explore and great luck, teach her to love this beautiful subject! ixl.com Sep 28 comment What is the most effective way of teaching mathematics to my 7 year old kid? Everyone is also different, you might also want to explore: goodreads.com/list/show/… Sep 28 comment What is the most effective way of teaching mathematics to my 7 year old kid? You can also get many worksheets here: teachingimage.com/index.php Sep 28 comment What is the most effective way of teaching mathematics to my 7 year old kid? This is very popular and once learned, can be a guide for a very long time across many fields: khanacademy.org/math/arithmetic Sep 28 comment Plotting temperature over time excel Does this help? youtube.com/watch?v=fIwanUubn7Q Sep 28 comment Plotting temperature over time excel I would recommend learning something that produces graphics that make this sort of thing easy and you can generate many graphic types (excel should be able to do this too). For example, Mathematica, Maple, Maxima, Sage ... See: at wolframalpha.com, type plot (25000∗x)/(1020∗3770) Sep 28 comment Proving that $x^3 +1=15x$ has at most three solutions. in the interval [-4,4]. In addition to the other answers, you might also want to look at: Descartes' rule of signs Sep 28 comment How do I integrate $\sqrt{x^2+81}$ using trig substitution? Sep 28 comment Where read recent developments in Math presented in a way that is easy to understand? You might also want to look at: mathoverflow.net/questions/15366/… Sep 28 comment Need help figuring out $\frac{d}{dx}(x^2)|{x=3}$ Evaluating a derivative of x^2 in respect to x at a fixed point (x = 3). Where did the sin term come from (another question)? Sep 28 comment Where read recent developments in Math presented in a way that is easy to understand? Maybe you can find things here: maa.org Sep 27 comment Do lay persons really believe that all of mathematics is known? I would have replied that that statement is equivalent to saying that everything in medicine is known. Of course that is nonsense. Old mathematics are improved and new mathematics is being discovered/defined ... Sep 27 comment Integration by Parts to find variable k (PDF problem) Regardless of method used, did you get this as a result before using your limits of integration? Use the Wolfram integrator or Wolfram Alpha Sep 27 comment Flaw in calculation of $\int x \, dx=x^2$ Is the problem written correctly? The integral result is wrong from the start. Was he trying to show that if you sum some set of rectangles you get the same results? Regardless, the title is wrong from the start.