Recent content by abotaha

Thanks for the replay. I also tried to solve these equations and i found that the solution contained complex number, however, the solution suppose to be real number. i do not know how i can processed further. please i need some suggestions.

Hi everybody, I have a couple of equations and I need to find the values of three variables (δ, λ, and θ). The equations are: M[11] = -(sin(δ)*cos(λ)*sin(2*θ)+sin(2*δ)*sin(λ)*sin(θ)^2)*M[0]; M[12] = (sin(δ)*cos(λ)*cos(2θ)+(1/2)*sin(2*δ)*sin(λ)*sin(2θ))*M[0]; M[13] =...

Thanks guys, I also tried to simplify the system such as: (a-b)(2fx^2 - 2cx + d) - ex(2fx^2 - 2cx + d) - 4f^2x = -2fc I searched for the cubic formula http://en.wikipedia.org/wiki/Cubic_formula#General_formula_of_roots". I found that there are some restriction (limitation or may say...

Hello guys, I am not good in advance mathematics. I have system of nonlinear equation and I want to solve it analytically, but I face some difficulties. Homework Statement The system is : (a-b)y^2-exy^2-2fx=-c 2fx^2-2cx-2fy^2=-d Homework Equations where: a,b,c,d,e,and f...

well you are right. i am trying to figure out this thing. cheers,

Thank Dickfore very much, It helps me a lot and the whole problem is solved. High appreciation to you. one last thing please can i apply Gamma function (the method above that you mentioned) when the integral boundaries from constant to infinity, like I_{k}(m) = \int_{c}^{\infty}{x^{k}...

Thanks for this nice explanation. I have not had any knowledge about the Gamma function. However if you are suggesting me to use it and you are sure about this method then I will used. thanks again, you are very kind and generous.

The variable is y as shown in the integration equation. This variable is called Leaf Area Index (LAI) which represents the area of the leaves of the trees.

It is zero because the variable that I am going to integrate is never be less than zero (That is what I recognized later).

Thanks too much. It helps a lot. The integral now is simplified a lot but i wonder how the integration would be if we define it, especially in case: e^b \left (a\int_0^{\infty} y^2 e^{my^2}dy+ b\int_0^{\infty} ye^{my^2}dy+ c\int_0^{\infty} e^{my^2}dy\right) any suggestion please.

Thanks a lot guys, I learned a lot from you, but to be honest with you I have not solved the problem yet. I cannot figure it out, but i am still looking around. a great appreciation for all of you. Cheers.

Thanks for the replay. It is still not clear for me. Could you please explain more.

Thanks for the replay. unfortunately, I had mistake in writing with the previous integral. the correct one is: \int_{-\infty}^{\infty} (-ax^2+bx+c) e^{-dx^2+bx+f} dx and i complete the square as you mentioned where the integral equation becomes: \int_{-\infty}^{\infty}...

Dear all, I have exponential integral with polynomial. I tried to solve it but I could not. the integral is :Homework Statement The integral equation is: \int_{-\infty}^{\infty} (ax^2+bx+c) e^{ax^2+bx+c} dx$ Homework Equations The Attempt at a Solution Can anyone help me please. Thanks...