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What is the command to get a sequence of the first twenty prime numbers

hello. before I used Mapple 15. But then I`ve run Mapple 16 and now I`ve a problem. I can`t use this program. I open the program, everthing is in the rule, but if I want to write any mathemathical function, or a letter, such as- x or x+2, the program does`t give any reaction. program only gives reaction the numbers.

Please, help me. (my english isn`t very good, and I don`t know I`ve explained my opinion).

Hi,

this question has been asked several times here already accoruding to the search function, but I didn't find an actual answer to it.

My Maple 15 gives outlarge numbers without scientific notation, so even 10^20 would be displayed as 1000....000  (20 zeroes). It seems like this is not the standard, so at one point I might have changed the way Maple displays the output, and cannot remember anymore how.

How can I tell Maple to display the output in scientiffic notation, and how can I set up the threshold of powers of ten, when this is done. (so that e.g. 100 still gets disaplyed as 100, and not as 1*10^2, but anything above gets displayed in scientific notation).

I know that I can right click on the output to change it's display form. But I want to change this generally, so I dont have to do this for any single numerical output I get.

I use Maple 15, running in Mac OS.

Thanks for help!

I have an expression (with important physical meaning), I want to transform all the nasty numbers into scientific notations like transforming 203475439 to 2.0347e8.... anyone could help? thanks

:

2.03475439*10^8*(-1.*((203475439/5340588290000000000000000000)*n*Pi^2./V^1.+(1/2)*sqrt((41402254276242721/7130470820821281025000000000000000000000000000000000000)*n^2.*Pi^4./V^2.+(10681176580000000000000000000/610426317)*V+(1/2430046173368675201713890432319677067995801002565000000000000000000...

I have been using random numbers in other applications than Maple. Usually there is a function, which will give a pseudo random real number between 0 and 1. When I looked for it in Maple I got quite confused, because there are a lot of different options here - obviously because Maple can deliver random numbers/objects in many ways, even following a certain distrubution. I found out it doesn't work by just using rand(), since it is always starting with the same value. Then I found the command randomize(...

Here is an example I have,

> evalf(sum(Zeta(p-2.)*2.9^p/GAMMA(.5000000000*p+1.), p = 4 .. infinity))

The Maple just returns me the same expression, but if I change the number "2.9" to be some other numbers (roughly >3 or <2.8), then Maple "will" give me the answers. What happened? Can anyone tell me why Maple refuse to do the work during that range of value (roughly between 2.8 to 3). It's even weird. If you change the initial index of the sum from...

here mentioned:

275305224 is the third 91768409 gonal number.

can you tell me in which of these algorithms we will reach to number 91768409 ?



wiki :

as you know the number of solutions for order 3 to 5 magic squares is as follow : 
(not counting rotations and reflections)

order 3: 1 solution

order 4: 880 solutions

order 5: 275305224 solutions

higher order: unknown ...

 

in the first look at 880 , simply appeared it can constructed by
2x5x8x11 (every factor increased by 3)

Hi

I have a problem with Maple. I would like to see an answer in numbers this equation, but instead I get more equations. I've tried to use evalf but that didn't work for me.

Is there someone who can look at this and help me?

Thanks in advance!

 

This is my Maple output (sorry for the uglyness):

> SomAx := Ax+F2+F6*sin(beta)-F1*sin(gamma) = 0;
print(`output redirected...`); # input placeholder
    ...

I'm trying to reproduce the following graph:

http://upload.wikimedia.org/wikipedia/commons/thumb/2/22/HarmonicNumbers.svg/600px-HarmonicNumbers.svg.png

I have got this far:

N:=10:
theHarmonicNumbersPlot := plot([seq([n,sum(1/i,i=1..n-1)-gamma],n=2..N)],style=point, colour=red):
theHarmonicFunctionPlot := plot(Psi(n), n=2..N, colour=black):
plots:-display([theHarmonicFunctionPlot,theHarmonicNumbersPlot]);

But my plot is missing the horizontal...

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