Can it be done simpler/better/faster?

F3 := proc (n) options operator, arrow; ln(n)*mul(evalf(1-1/i), i = seq(ithprime(i), i = 1 .. n)) end proc; F3(100000); evalf(%);

F2 := proc (n) options operator, arrow; -ln(ln(n))+add(evalf(1/i), i = seq(ithprime(i), i = 1 .. n)) end proc; F2(100000); evalf(%);

F1 := proc (n) options operator, arrow; ln(n)-add(evalf(ln(i)/i), i = seq(ithprime(i), i = 1 .. n)) end proc; F1(5000); evalf(%);

how to write a procedure that counts ferquency of used letters in a string of a text for ex in this txt: fregs("I have the best dog.");

Hello all,

I'm fairly new to Maple and this problem has had me puzzled for hours now. I simply want to solve an algebraic equation, but I get 6 RootOf solutions. I need a numerical value. I've already tried a couple of things (and browsed these forums) but I haven't been able to achieve this...

I have included my worksheet so you know what I'm talking about.

The value I'm trying to find is t_AC. I've tried allvalues(%) and convert(solAC[1],radical) but none of these would work. Do any of you have more useful ideas?

My Maple version is 11.02.

Please somebody can help : I have a matrix of 50x2 and I want to show her like another matrix of dimensions 17x6 Thanks for your help

How do I get Maple to display the result in lowest terms?  Maple is multiplying the numerator and denominator by 10000.  The answer is correct, but how do I prevent the numbers from being multiplied by 10000?  Do I have a setting or preference set incorrectly?

 

Hey guys, I am trying to plot a direction field using Maple 11.: //*** first I define the spline, this is the function that is giving me the error with(CurveFitting); BasinArea := H -> Spline([[-10, 36000000], [-8, 47000000], [-6, 57000000], [-4, 70000000], [-2, 81000000], [0, 89000000], [2, 95000000], [4, 100000000], [6, 105000000], [8, 111000000], [10, 125000000]], H, degree = 3) ; //*** then I define the two other functions that are used in the DE (error is not in these but I include them for //*** completeness)

I have created a user simplify procedure

`simplify\mysimplify` := proc(fun) ... etc ...

It works correctly, but not when i add it in a module.
ie a call as :

with(MyModule); simplify(x^2+x,mysimplify)

dont call mysimplify.
But it works if I call it directly

with(MyModule);
`simplify\mysimplify`(x^2+x);

I think I miss something but i can't point the error. What is the correct declaration ?
(the module is correct, others procedure works fine)

 

The attached worksheet shows you how to determine the arc length function and calculate the arc length of a function. The Arc Lengths Tutor will improve your understanding and help you with your homework ! You can also skip right away to an interactive video tutorial:

(Ctrl + Click)


Video Tutorial: Arc Lengths

Feel free to drop some comments !

 

Hi there ! The attached worksheet has a good review on the theory of determining volumes of solids through the method called "volume by cylindrical shells". You can also view an interactive video that shows you how to use Maple's powerful Volume by Revolution tutor that will help you with your homework.

(Ctrl + click on link)

<a href="http://www.maplesoft.com/demo/adoption/volume_by_cylindrical_shells.

 

Maybe this is a stupid question but if I have a function

 

 

how do I differentiate V with respect to t1 diff( V , t1) ?

 

 

 

 

How to find the total derivative of h(x,y,z) = (x+ y - z, sin(xyz) + e).

maple help shows partial derivative explanation but has not much for total derivative. I haven't learned total derivatives yet so any help is thankful.

thx

 

I have a problem with my calculations. I have changed the Order to 15. If I go any higher than this I get the error message:

"Error, invalid input: rhs expects 1 argument, but received 0"
 

after the loop. I need to calculate more terms. Does anyone know why this is happening and how I can fix it?

This is the spreadsheet

> restart;
> with(plots);
> nmax:=14:
> Order:=nmax+1:

Hi

I was wondering if maple is capable of making a plot with 2 y axis, I'm thinking of something along the lines of having temperature as a function of time, displayed in both deg C and deg F, on the one plot.

I have the student edition of maple 11.

Many thanks

Frontline

I have a differential equation, let us call it

F:=12*diff(u(x),x$7)^(3/2)*diff(u(x),x$2)^3+8*diff(u(x),x$6)^4+4*diff(u(x),x$4)*diff(u(x),x$3);

First, I need to know the term containing the highest order derivative:

with(PDEtools):

k:=difforder(F);

This command returns k=7 and now I need to deal with the term:

12*diff(u(x),x$7)^(3/2)*diff(u(x),x$2)^3

Now my question begins. How can I get

1) The non-derivative coefficient of this term? (answer is 12)

i have a second-order nonlinear equation with an infinity condition....at first i assume F'(0) like alpha....after finding F(x),i will use pade for F...but i have a problem,cause my condition is F(infinity)=0 and by limiting i cant find alpha because when it goes to zero,it doesnt depend upon what the alpha is..it backs too orders...so...how can i use pade for finding F'(x)?!!!....plz help me:((