Mathematics Stack Exchange
Mathematics Stack Exchange

Questions tagged [wolfram-alpha]

For mathematical questions related to the usage of WolframAlpha.

WolframAlpha is an answer-engine developed by Wolfram Research that answers factual queries by directly computing the answer from structural data. Note that questions on how to use Mathematica should be asked on Mathematica Stack Exchange.

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Calculating daily sunlight hours on the North side of a hill with Wolfram Alpha

I recently bought a house that sits on the North side of a hill. The owners say that for a couple of days out of the year the sun never rises over the hill. It got me thinking of using Wolfram Alpha to compute the maximum altitude of the sun…
Tom Clark
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Range of function $f(x)=x \sqrt{1-x^2}$

How to find range of this function, it looks easy but somehow I am not able to do that . What is more important to me is , why is wolframalpha unable to find the range , is it not a simple enough function ?
Aditya Prakash
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How does one test whether a positive integer is semiperfect in Wolfram Alpha?

Wolfram Alpha allows to test whether a positive integer $n$ is abundant, deficient or perfect. However, I was not able to find a way to test whether $n$ is semiperfect (i.e., equal to the sum of all or some of its proper divisors). How can I go…
Klangen
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Why does Wolfram show two different medians for this dataset?

If you enter these values into Wolfram: {18,21,13,19,24,17,14,12,15,14} In the Statistics output it shows a median of 16, which is correct. However, in the Box and Whisker chart, it shows the median as 15. Does anyone know why?
Randy Minder
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radius of convergence of $1/\ln(in)$

I have series when $n$ goes from $1$ to infinity $(z/\ln(in))^n$ and need to find the radius of convregence. I tried this $1/R = \limsup ((1/\ln(in))^n)^(1/n)$ when $n \to \infty$ (Cauchy's rule), $1/R = \limsup 1/(\ln i + \ln(n))$ when…
Robi
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Why WolframAlpha is returning only 2 Roots for a Polynomial Equation of 6 Degree ??

I think this is really weird. I want to solve the following equation: $$(2x^2+3x+5)^3+(2x^2+3x+5)^2=0$$ This is a polynomial equation of 6 degrees. It should have 6 roots. But wolframalpha only returns 4 roots! Anything I miss? This is the command…
Graviton
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Inputting complicated equation into Wolfram

I am having a bear of a time getting this equation into Wolfram so I can solve it for E(r) = 1000. Everything is constant except for little r, which is the cursive r in each term. In case anyone is wondering, this is the expression for the…
user99984
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Plot a piece of a spherical shell - Wolfram Alpha website

I'd like to know how to plot a piece of a spherical shell $0.118
Gennaro Arguzzi
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Convert latex to wolframalpha.com compatible expression

I have latex \frac{-\left(2\left(b_{x}-a_{x}\right)\right)+\sqrt{\left(2\left(b_{x}-a_{x}\right)\right)^{2}-4\left(a_{x}-2b_{x}+c_{x}\right)\left(a_{x}-g_{x}\right)}}{2\left(a_{x}-2b_{x}+c_{x}\right)} It's not malformed and renders…
minseong
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Wolfram alpha gives two different answers for $\int^{\infty}_{-\infty} x \frac{1}{\pi} e^{-(\ln(x) - 0.3)^2} | \frac{1}{x}|dx$

So, I'm trying to calculate $$\int^{\infty}_{-\infty} x \frac{1}{\pi} e^{-(\ln(x) - 0.3)^2} \left| \frac{1}{x}\right|dx$$ When I input that into WA, it loads for a bit, then shows this result: Just to almost instantly change to this other result:…
Rararat
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Using Wolfram to convert a value chart into graph

Is it possible to use Wolfram Alpha to make something like this into a graph and have it display the proper function? In that case, how would I syntactically write it in Wolfram?
Jonathan
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What is causing this weird behaviour in Wolfram Alpha, when computing this infinite Sum involving the Zeta function?

This is the Sum: $$\sum\limits_{n=1}^{\infty} \frac{\zeta(2n+1)-1}{\zeta(2n)-1}$$ Sum is divergent, but Wolfram acts weird and after a correct display of early values, it starts converging to a random value: Wolfram Alpha (Link computes the Sum up…
Frax
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Wolfram Alpha: How to evaluate the difference of a function at two points

I'm just using the website and not the programming language or anything like that. I want to type in: evaluate x from 2 to 5 and get 3 back as an answer, but instead it's drawing a graph and then giving me the arc length of the curve between those…
James Ko
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Why wolfram cannot get the third solution?

https://www.wolframalpha.com/input/?i=%5Csqrt%7B3x-4%7D%2B%5Csqrt%5B3%5D%7B5-3x%7D%3D1 This surely has the third solution as x= 13/3. But: https://www.wolframalpha.com/input/?i=x%3D%3D13%2F3%2C+%5Csqrt%7B3x-4%7D%2B%5Csqrt%5B3%5D%7B5-3x%7D-1 Why…
Brady Zeng
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How to make Wolfram Alpha give me a range of possible answers for an equation if the subject is assumed to be an integer?

I am trying to use Wolfram Alpha, and I am trying to get it to give me a range of possible answers for y=(391-x)/x, if y was an integer. However, there are two problems I face with this. The first is that I'm not sure as to how to tell WA that I…
bio
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