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.

698 questions
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Wolfram|Alpha: Calculate an expression for $x^2y=-2$

I would like to calculate the expression $(xy)^8*x^8$ knowing that $x^2y=-2$. What should I write in Wolfram Alpha to get the expected result? Kind regards, Alexis.
Alexis Lamotte
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How can I get solution to this partial differential equation using Wolfram Alpha?

Solve: $\frac{\partial ^3z}{\partial x^3}-4\frac{\partial^3z}{\partial x ^2\partial y}+\frac{\partial ^3 z}{\partial x \partial y^2}-2\frac{\partial^3z}{\partial y^3}=e^{2x+y} $ I want to get the solution to this partial differential equation using…
Soumee
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Wolfram Alpha - limiting the input X set to prime integer numbers

I was curious if I can get wolfram alpha to calculate for me the values of Y, but using only the prime integer values of X . Currently I have the following: solve y=x+(30/x)+1 over the integers I would like to do something like this: solve…
Menelaos
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How can I calculate area enclosed by three curves in WolframAlpha?

I'm trying to calculate the region enclosed by $y=\frac{1}{x^2}$, $y=x$ and $y=4$ for $x \in [\frac{1}{2}, 4]$ How can I do this? I know I can use definite integral for this task but I want a general formula that I can apply in WolframAlpha to check…
Matt
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Does y = 2 + 0(1/(x-2)) contain a hole? Seemingly no?

Out of curiosity, I typed the equation y = 2 + 0(1/(x-2)) into wolfram alpha to find that it simplified it to y = 2. Is this correct? I assumed there would be a hole or some lack of continuity at x = 2 since I didn't think 0 * undefined = 0. Is…
Henry
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How do I tell Wolfram Alpha that I want the fourth derivative of y in a differential equation?

For example, how would I enter y^(IV) - 16y = 0? typing out fourth derivative, and putting four ' marks does not seem to work.
IgnorantCuriosity
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$\int_{c}^{c+2L} cos(\frac{2\pi nx}{L})$ Wolfram Alpha gives me this result but when doing I dont get it

$\int_{c}^{c+2L} cos(\frac{2\pi nx}{L}) = \frac{L sin(2\pi n) cos(\frac{2 \pi n(c+L)}{L})}{\pi n}$ dx with $n = 0,1,2,...$ I put this integral in Wolfram Alpha and gives me this result, but when I try to do it at hand I arrive to other result. Is…
Juan Camilo Acosta Arango
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How do I get wolfram to solve this problem?

I am trying to check some answers and can't seem to get wolfram to work properly. I type in the following command : integrate x.sin(x) dx and it doesn't provide any solution it just says "visual representation of the integral" and then gives…
user3528592
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Order of operations on Wolfram Alpha

I am confused by the fact that on Wolfram Alpha x(2)/x(2) = 1 but 2(x)/2(x) = x^2. Could someone explain what rules are being used here?
Chris_F
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Parametrization of curve

I need to find parametrization of $(1+x)y^2=(y+2x)x$. I tried to put all $x$-s on one side, and all $y$-s on other but that can't be done. Could someone please help? Thanks.
Robi
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Polar graph inWolfram alpha

Maybe do you know wolfram alpha which draw graph Bu I cannot draw polar graph. For instance $$r=2\cos\ (t)\ : x^2+y^2=r^2=2r\cos\ t=2x\ (circle)$$ If we enter this, then it show $cosine$ graph, not a circle. How can we draw polar graph ?
HK Lee
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How does one provide a determinant as input to Wolfram Alpha?

$\begin{vmatrix} 17&-12&4&0\\ 5&9&-2&1\\ 3&-6&-1&14\\ 11&7&0&8\\ \end{vmatrix}$ How would one express the preceding determinant in the Wolfram Alpha™ environment?
Senex Ægypti Parvi
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Help with creating formula

Lets say I have colony of 100 bacteria's. Within 1 year, each of bacteria brings up a "child" and becomes "infertile". After next year, children of bacteria bring up "children" and becomes "infertile". Assuming that bacteria is immortal and will…
Rik Telner
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Wolfram Alpha unexpected answer.

http://www.wolframalpha.com/input/?i=5+%2B+%286.7a%29%2B+%28a+%5E+0.8%29 What does "imaginary part" mean?
user117031
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Solve equations in Wolfram with given variables

I am trying to use an equation as a template in Wolfram Alpha where the variables change. The equation is $-n = m - x\left\lbrack a - w\left(x - \frac{2l}{3}\right)\right\rbrack - w\left(x - \frac{2l}{3}\right)\left(\frac{l}{3} +…
user88720
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