restart; interface(rtablesize = 10): _EnvHorizontalName := 'x': _EnvVerticalName := 'y': eqPA := (y-b0)/(x-a0) = k: solPA := y=solve(eqPA, y): #k coefficient directeur de PA eqPB := (y-b0)/(x-a0) = -1/k: solPB :=y= solve(eqPB, y):#PB perpendicalaire à PA xA := solve(subs(y = 0, eqPA), x): yB := solve(subs(x = 0, eqPB), y): eqAB := x/xA+y/yB = 1; x k y k eqAB := --------- + --------- = 1 a0 k - b0 b0 k + a0 t := solve(a*(xM+(1/2)*t*a)+b*(yM+(1/2)*t*b)+c = 0, t); 2 (a xM + b yM + c) t := - ------------------- 2 2 a + b #Recherche des coordonnées de la projection d'un point sur une droite D #M(x,y)un point quelconque du plan, M'(x',y') son symé trique dans la symétrie orthogonale d'axe D #le vecteur MM' est colinéaire du vecteur normal n de D; vec(MM')=t.vec(n), n=

Hi! I can´t see what i´m doing wrong! :( Thank you for your help!!!

Hello everyone, here i Denmark we are using comma as a separator for decimal numbers. I have looked in the forum and found that if i changed my region in windows settings, but it is Denmark. When i use number formatting it tells me the output will be with comma as a separator,  but the output comes out with period as the separator. Is there a way to change it manually ?

 

 

I am interested in the root of the equation ((2*n-1)*x + 2*n + 1)*x^n = 1 - x, where 0 < x < 1 and n is a large positive integer.  I believe that the root converges to 1 as n goes to infinity.  How does one obtain an asymptotic estimate of the root for large n?

 

Hello fellows,

I am currently using Maple and surprised I can not solve the following problem. I want to use a function as the upper limit of an integral, for example

f(t) := int(1/x, x = 1 .. t) .

Could anyone tell me why Maple won't understand this?

Thank you for your help, I wish you a nice week.

Mac

Hi, 

I am trying to derive solutions for cubic equation using Maple.

Problem I encountered is it automatically cancles and simplifies, I cannot reach to the final form using Maple commands except modifying the equation by myself.

like, 

(-108*q - 12*sqrt(12*p^3 + 81*q^2))^(1/3)/6 into (-q/2 + sqrt(p^3/27 + q^2/4))^(1/3)

Another one, even though I want this fractional form, it becomes other form automatically

(-q/2 + sqrt(p^3/27 + q^2/4))^(1/3) into (-q/2 + sqrt(12*p^3 + 81*q^2)/18)^(1/3)

Thank you.

Hi

how can i find the answer if this integral analytically

int(exp(-b*x)/(exp(-2*b*x)*a+exp(-4*x)),x);

Hi! my name is Euge, i live in Argentina!
I´m solving a problem that ask me to find an ODE from a family of curves, 
I know this is pretty simple, I have to derive the equation two times, but i can´t find a comand in maple that helps me do that. Is there any?
Thank you! 

Hey there.

I've been using the threads package to parallelize some code. It's going well for the most part - my code runs way faster and I can observe with my System Monitor (ubuntu) that multiple cores are indeed being used. However, ~ 4 of every 5 times I try to run the exact same code, Maple will get stuck on a threaded calculation. If I follow the CPU usage in these instances, I see that one of the CPUs is maxed out at 100%. I am forced to quit Maple and kill the kernel process. Has anyone seen something like this before?

 

Thanks in advance.

Hi

how can i solve this

dx+4*x*dy/y = dy*a*y^(-6*b-1)

to find x in terms of y

Hey everone, im trying to get 2 legends to apear on my plot im animateing. The problem here is that it just wont. Could you guys help me ?

Heres the code

c := x -> piecewise(0 <= x and x <= 450000, 0.37*x, 450000 < x, 0.37*x + 0.06*(x - 450000));
g := x -> piecewise(0 <= x and x <= 558000, 0.37*x, 558000 < x, 0.37*x + 0.12*(x - 558000));
A1 := plots:-animate(plot, [g(x), x = 0 .. skat, color = blue], frames = 20, skat = 0 .. 1000000);
A2 := plots:-animate(plot, [c(x), x = 0 .. skat, color = red], frames = 20, skat = 0 .. 1000000);
Do(%Plot2 = plots:-display([A1, A2], size = [1000, 700], gridlines = true, legend=["Line 1","Line 2"],legendstyle=[font=[Lucida, roman, 14], location=bottom]));
SetProperty("Plot2", ':-play', true, ':-refresh' = true);

Hi everybody,

Im trying to solve the following trivial pde using Maple 2018

pdsolve([diff(Y(x, t), t, t) = 0, Y(x, 0) = 0, (D[2](Y))(x, 1) = 0]);

Obviuosly the solution is Y(x, t) = 0, but Mapple 2018 is not giving any answer.

This works in Maple 2015.

Why is not working in Maple 2018?

Thanks,

Javier

 

I have the equation y^2=𝑎𝑥^3+𝑏𝑥^2+𝑐𝑥+𝑑.

How do I plot y against x as the coefficients a, b, c and d vary?

Thank you for your help.

hi, I am trying to evaluate the following integrations (Note that; the values of alpha, lambda_1 and lambda_2) are random and they change with every iteration 

>  >  >  Warning,  computation interrupted   Warning,  computation interrupted   Warning,  computation interrupted   Warning,  computation interrupted   Warning,  computation interrupted   Warning,  computation interrupted   Warning,  computation interrupted   Warning,  computation interrupted   >

 

Download ask_maple.mw

 

Hello,

What means, please, this error

 

Error, (in RootFinding:-Analytic) Maple was unable to allocate enough memory to complete this computation.  Please see ?alloc
 

 

What should I to do to overcome this error?