# Questions tagged [wolfram-alpha-queries]

Use this for questions about calling Wolfram Alpha from Mathematica. Questions about Wolfram Alpha itself are off-topic.

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44 views

### General: 2456 is not a valid variable [closed]

... is not a valid variable i dont know whats happend
47 views

### How to make this expression?

How to code this expression in WolframAlpha. I am interested in how to code the second sum, because it contains a boolean expression: $$\sum_{i=1}^{100}{\sum_{j>n}}{x_{i}x_{j}}$$
48 views

### Why doesn't Mathematica provide an answer while Wolfram|Alpha does, concerning a series convergence?

Among other series I've been working on, I was asked to find whether $$\sum_n 1-\cos(\frac{\pi}{n})$$ converged, and Mathematica's output to ...
142 views

### How can one expand an arbitrary boolean combination into the $2^n$ atoms of the associated boolean algebra of size $2^{2^n}$?

The answer of user250938 to Can one usefully apply the Boolean functions of Mathematica to measurable Boolean sets? and the second comment of Monroe Eskew to the answer to https://mathoverflow.net/...
67 views

### The Branch Cut of the Complex Logarithm Used by Default in Wolfram Alpha

The title says it all: what branch cut (like which value of $k$ in $\ln(z)=\ln(r)+i(\theta+2\pi k))$ does Wolfram Alpha use by default in calculating the complex logarithm. I would say "principal ...
105 views

### step-by-step solution unavailable (( possible intermediate steps ))

When using the (( WolframAlpha["integrate 1/(2+Sqrt[1-x]+Sqrt[1+x])"])) function to find integration steps, this message appears to me what is the explanation and ...
42 views

### What is the current WolframAlpha server capacity?

Considering the increasing workload WolframAlpha is now receiving as it is getting more tightly integrated into the Wolfram language. With things like Entities even ...
98 views

### How to change the Wolfram Alpha query timeout for Ctrl+=?

Sometimes retrieving results from Wolfram Alpha takes time and the default query timeout is not sufficient. For engagement with Wolfram Alpha implicitly for expr ...
44 views

### How can I price of 100 EUR in RON on 1st of every month back to 4 years

I would like to see the difference between 450 RON and 100EUR converted to RON on 1st of every month back to 4 years. possibly with a cumulated chart...
168 views

### Difference between free-form input via WolframAlpha[] and CTRL+=

WolframAlpha["query"] - https://reference.wolfram.com/language/ref/WolframAlpha.html Free-form input - https://reference.wolfram.com/language/workflow/EnterFreeFormInput.html For example: ...
167 views

### Step by step solution of a limit of a sequence - Calling Wolfram|Alpha in Mathematica

I'd like to visualiza the step-by-step solution of the following limit by calling Wolfram|Alpha in Mathematica, but I don't know how to specify that n is a positive integer variable: ...
71 views

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### CloudDeploy fails when using WolframAlpha as APIFunction

I am trying to create a Wolfram API that returns, for an input expression, how Wolfram Alpha interprets that input. For example, given the string "1 plus 2", the API should return "1 + 2". Locally, ...
114 views

### Plot with Wolfram Alpha Scientific Data

Now that Mathematica has already embedded Wolfram Alpha, so I'd like to plot a graph: "Air Density" - "Elevation". I know that yields But I can't do that 10000 ...
35 views

### How I can define and arrange following linear equation?

We have: Theta * (2L-K) = 0 Theta cannot be zero because it's angle parameters. (2L-K)=0 then We can calculate L=K/2 How we can define this constraint in Wolfram|...
238 views

### Conditional Summations

I am not a math major, but for a networking class, I am taking I am required to do summations for probability. I know the logic but I don't know the mathematical theory to make this work. Using ...
120 views

### Confusion in finding the definite integral

So, I'm new to Mathematica. I tried evaluating the following definite integral. However the answer i get from wolfram alpha & mathematica are different. Can someone please point out what I'm ...
62 views

### How can I compute how many primes of this kind are up to $N$?

In the following link: https://oeis.org/A079796/b079796.txt we can see the first 10,000 prime numbers $p$ with the property that both $(3p)^2 + p^2 + 3^2$ and $(3p)^2 - p^2 - 3^2$ are primes ...
827 views

### Step-by-step solution of a system of symbolic equations - Call Wolfram Alpha in Mathematica

I'm trying to get a step-by-step solution of a system of symbolic equations: ...
321 views

### How to query Wolfram Alpha to find projection of point on plane? [closed]

For example, the projection of the point $P=(1,2,3)$ on the plane $x+y+z=3$ is the point $Q=(0,1,2)$. How do I ask Wolfram Alpha to compute this? I've tried "projection of point (1,2,3) on plane x+y+...
2k views

### How to ask WolframAlpha to find 'x such that p=32*x+1 is prime'

I want to find prime $p$ in form of $p=32 x+1$ How can I ask WolframAlpha for such $x$ that will fulfil this equation? EDIT: let's say that $100$ or $n$ solutions is enough for me EDIT2: I need x's ...
441 views

### Can I make Wolfram Alpha use a specific substitution when integrating? [closed]

Can I define the '$u = \dots$' for an integral? For example when I integrate $\frac{x^3}{\sqrt{6 - x^2}}$ with respect to $x$, the program automatically sets $u = x^2$, how can I change this so it ...
112 views

### how to get historical data from wolfram alpha

The following command give historical data from 21th April 2017 to 19th April 2018. Which is about 1 year. How do i get this result for past three years from wolfram alpha. ...
60 views

### WolframAlpha robustness

I am experiencing return values of Missing[NotAvailable] from WolframAlpha[], about 10% of the time. For some reason, this seems ...
190 views

### Find the average GDP of multiple countries at once

How would I find the average GDP of a list of countries between set years? I know how to do it for one but I'm not sure about multiple values. I also wish to find the average population size. An ...
146 views

### list of dates for vernal equinox

I'm trying to get a list of dates and times of the vernal equinox for the last 30 years (or some other time interval). I'm flailing about and really have gotten nowhere. When I've tried typing ...
355 views

### Find optimal integer solution to linear equation (Wolfram Alpha)

I'm sorry if this is potentially off topic, but I posted this question at the Math SE and they pointed me here. Both SE sites have a tag for Wolfram Alpha, but maybe you guys are better equipped to ...
101 views

### WolframAlpha function does not return structure diagram for chemicals

Neither one of WolframAlpha["Caffeine"] WolframAlpha["Caffeine","FullOutput"] returns a structure diagram for the molecule. It's consistent since ...
142 views

### how to get a relation between two parameters from a single equation

2 (ϕ'[r])^2 - 2 u'[r]/r - (u'[r])^2 - u''[r] == 0 I need to get a relationship between u and ...