# Tagged Questions

For questions related to usage of Wolfram Alpha.

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### How can I get the angle on radian on wolfram?

Here, the argument of a complex number in degrees is given. How can I ask wolfram to convert it into radians (they give an approximation).
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### What does $\sqrt[6]{-1}$ mean on wolfram?

To solve $X^4-X^2+1=0$, wolfram wrote $\pm\sqrt[6]{-1}$ and $\pm(-1)^{5/6}$. Does it mean $\sqrt[6]{i}$ and $i^{5/6}$ or $\pm e^{\frac{i\pi}{6}}$ and $\pm e^{\frac{5i\pi}{6}}$ ? In fact, nothing ...
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### How to solve this integral and limit?

I am trying to solve this integral and limit; $$\lim_{n\to \infty}{\int_0^n\int_0^n\int_0^n\int_0^n\sqrt{\left({e-b\over n}\right)^2+\left({c-a\over n}\right)^2}de\ dc\ db\ da\over n^4}$$ I tried ...
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### How to make Wolfram answer in a “whole minutes and seconds” format?

This query on Wolfram Alpha 21m25s/4.4 gives me the following results: 4.773 minutes 5.682 seconds 4.867 minutes 292 seconds ...
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### Wolframalpha, picturing sets

I have a short question. Is there a way to picture sets like $\{z+2\pi k+i, k\in\mathbb{Z}, z\in S^1\}\subset\mathbb{C}$ with wolframalpha, or any other online tool? Thanks in advance.
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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 ...
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### How to graph 3D functions of two variables on Wolfram Alpha?

How to graph this on wolfram, google, or other free software: \begin{alignat*}{3} x(s, t) &= a\cos(mt) \cos^{k}(ns) &&\cos(t) &&\cos(s), \\ y(s, t) &= a\cos(mt) \cos^{k}(ns) &...
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Full disclosure; I have a very very basic understanding of higher math. I apologize if this is stupid / has been answered. I don't really know how to even format my question. I have a formula used in ...
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### Is the solution from wolfram alpha for $x^4+bx^3+f=0$ only wrong for $b=0$?

edit, tldr: it seems like the question is interpreted as "for which combinations of a and f is there a solution to the expression"? I'm only interested in "for which combinations of a and f is the ...
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### Represent $50+49+48$ and so on to zero

How do I mathematically represent the operation of adding $50$, for example, to continuous decrements by $1$ until we reach $0$ ? $50+49+48+47+\dots$ until we reach $0$. For example, how do I put this ...
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I am trying to find a relation between hypergeometrics $${}_2F_1(a,b,c;z)\,\,\text{and}\,\,{}_2F_1(a+1,b+1,c+1;z)$$ I can see that $$\frac{\partial}{\partial z}{}_2F_1(a,b,c;z) = \frac{ab}{c}{}_2F_1(... 0answers 13 views ### Inserting “holes” on a graph. I am trying to plot the set A = \big\{(x,y) \in \mathbb{R}^{2} \mid x^{2} + y^{2} < 2 \big\} - \big\{(0,\frac{1}{n}) \mid n=1,2,3 \dots \big\}. I have tried different combinations of set ... 0answers 56 views ### Maple and WolframAlpha return different results I solved the integral of u/(1-u) by hand and found as result -ln(1-u) - u + constant. Now, when I evaluate this integral with WolframAlpha, I get the same result. But when I evaluate it with Maple, it ... 0answers 37 views ### Application of Initial Value Theorem Let$$F(s):=\frac{s}{2s-i}$$be the Laplace transform of some f(t). I have been asked to compute f(0^+) assuming that this quantity, intended as limit, exists. I thought I could apply the IVT ... 2answers 47 views ### Calculating limits with Wolfram|Alpha in a random graph setting with n vertices and edge-probability p I want to show that \binom n4p^6\to 0 as pn^{2/3}\to 0. To check this is even true, I submitted this Wolfram|Alpha query. Now ... 0answers 66 views ### Solid has same volume when axis of rotation increases? I'm working on calculating the volumes of different solids using integration. The problem I'm working on says to find the volume of two solids, one revolved around the line x = 4 and the other ... 2answers 39 views ### About a solution in Wolfram Alpha I'm intrigued by this finding on the extraordinary portal WolphramAlpha. What is the reason why the solution has not been simplified, eliminating the factor \frac{\sqrt x \sqrt{x+2}}{\sqrt {x(x+2)}}... 1answer 39 views ### CAS based math program that can evaluate two sided limits? Ex:\lim _{x\to 0}\left(\frac{1}{x}\right)=DNE I am new to Calculus and would like a CAS program to check my work without any hassles. I tried evaluating \lim _{x\to 0}\left(\frac{1}{x}\right), a limit where the two sided limit DOES NOT EXIST in ... 2answers 630 views ### A ''strange'' integral from WolframAlpha I want integrate:$$ \int \frac{1}{\sqrt{|x|}} \, dx $$so I divide for two cases$$ x>0 \Rightarrow \int \frac{1}{\sqrt{x}} \, dx= 2\sqrt{x}+c  x<0 \Rightarrow \int \frac{1}{\sqrt{-x}} \, ...
I'm trying to plot a standard deviation function using WolframAlpha's function plotter and my function looks like this: $SD(Y) = \sqrt{\sum_{i=2}^{k}\frac{k(i-1)}{ (k-(i-1))^2 }}$ where k goes from 1 ...