How could I find the max x value of the following plotted graph?

 

plot(diff(2*Pi*(x+1)*(ln(sqrt(x)+1)),x$4));

 

I've tried finding the max x value of this graph with

solve(diff(2*Pi*(x+1)*(ln(sqrt(x)+1)),x$5)=0);

but it failed to give me a numerical answer.

 

Thanks

Sam

Hi,

I'm going nuts trying to get the commands(code) to solve the following two problems:

Problem 1 Verify that the given function is a solution of the initial value problem.

y:=x^2*(1+ln(x));       y'':=(3*x*y-4*y)/(x^2                      y(e)=2e^2        y'(e)=5e

 

I'm trying to solve for the following matrix X such that

B=X^T.A.X...i.e. B equals X transposed times A times X. A and B are known. and are square matrices. I've been messing aroundwith Maple, and I know it can do this, I just can't figure it out. Thanks.

A=[2    3]

     [1    4]

B=[1    0]

     [0    1]

Hello everybody, I was wondering if one can find the minimal (or "irreducible") polynomial of a algebraic number. For example, x^3+6x+8 is irreducible. We do alias(theta = RootOf(x^3+6x+8) ); Then we are looking for the minimal polynomial of (theta^2)/2 for example.. How can we find this minimal polynomial? Is there a simple command in maple? Thanks in advance.

I have installed Maple 11 and activated it. Everthing seems to be ok but i can't evaluate what i enter,  in worksheet and Maple input mode  (it suprisingly automatically set to text ) i enter i.e

. x=3;

writes

x=3                 (1)

but when i enter

x+4; it

still writes

x+4                   (2)

What single change in Maple would you want more than any other?

Maybe it's an enhancement, or a functionality change, or a bug fix.

Just for reference I'm woking on problem number 26 in "Schaum's Outline Series " for tensor Calculus.

It gives you a Schwarzchild metric and asks you to calculate the Einstein Tensor.  I'm using the example of doing this that's given in the "tensor" package help pages.  However I'm not getting quite the right answer.

In the metric given in the problem the [1,1] component is an exponential exp(phi) and the last component is also an exponential, -exp(psi).

Hi! My problem is the following: v := Vector([v1, v2]); m := Matrix([[m11, m12], [m21, m22]]); C := m.v; Then Maple returns with C in the following form: m11*beta+m12*r m21*beta+m22*r And I want Maple to return in the form: [m11 m12 * [v1 m21 m22] v2] Thanks!

I am trying to integrate a function numerically, but Maple doesn't give an answer:

restart;

ko:=2*Pi/v*f;v:=2.998*10^8;f:=2.525*10^9;

Lo:=29.379;Wo:=34.477;

evalf(eval(1/(120*Pi^2)*Int((sin(ko*W/2*cos(theta))/cos(theta))^2*sin(theta)^3*BesselJ(0,ko*L*sin(theta)),theta=0..Pi),[L=Lo,W=Wo]));

I have Maple 12.

Thanks for your comments in advance.

Hi,

I'll have to found the equation of equilibrium in terms of displacement for shell with double curvature. Well, I have 3 equations and 3 other equations that I must put in the others 3. Manually it's a suicide, ho can i do it with Maple and at the end semplify the differential equations? My problem is to say at Maple the dipendence of some function from other variable!

Thanks a lot!

 

Various transformations on the members of a list can be easily done using things like `+`(op(map(f, L))) for a list L and a function f (e.g., f:=x->x^2 to get sum of squares). How can we do such transformations on two or more lists using map? For example, how do we do most effectively squared sum of differences between the corresponding elements of two lists?

 

Hello, I'm trying to numerically integrate the attached integrand for x from zero to one with high precision. When I get to software floating point (15 digits or higher), the Maple server goes beserk allocating memory, and loses its connection to the Maple application. I have tried different methods (_Sinc, _Dexp, _CCquad, _Gquad) and in each case I have to terminate Maple. The "_d01" methods terminate without giving an answer.

Hi,

I have just another question. I would like to create a high resolution jpg file of a 3D plot, but I get only pictures in a very bad quality (even by using the plotpoints command).

How can I enhance the quality of exported picture files?

Thanks,

Dirk

Hi,

I have some numerical data (-> data2.txt) for a velocity profile (x- and y- coordinate with corresponding velocity). I would like to compare this data with a analytical function (3D plot -> Maple file).

Do anybody know, how

#1 to get the data - points in the 3D plot and

#2 how to determine the error between the data - points and the 3D plot?

Thanks,

Dirk

I am new to maple and trying to create an IDF curve (intensity duration frequency curve) for rainfall. The fomula is quite simple I=A*T^c, where I-= rainfall intensity, A is the average rainfall in a given period and T is time of concentration (10 min) and C is a coeffecient developed from 40 year annual rainfall data

Now what i need to do is for a strom return period of 2, 5,10,25, 50 and 100 year storms, plot the I value for each of these years (I have 6 A values and 6 ^c values) that corespond to each year 2,5,10,25,50, 100