1. The problem statement, all variables and given/known data So I honestly had to idea where to put this. I know how to solve the problem, but I cannot get Matlab to work. This questions is more of a matlab question. I figured since the underlying problem was physical in nature I would post here, so forgive me if I am wrong. The problem is attached. I have solved parts 1 and 2. It is part 3 I am having trouble with. 2. Relevant equations In addition to the one given in the problem, u(r) = 4e(((r0/r)^12)-((r0/r)^6)) 3. The attempt at a solution I have: Code (Text): function problemOne %declare symbolic Variables N=6.023e23; k=1.3806503e-23; %units (m^2)kg/(s^2)K e=k*213.96; %units of k * 1/K r0 = 426; %units of pm syms r T; %set y to be function inside integral in B y=exp(((-4*e)*(((r0/r)^12)-((r0/r)^6))/k*T)-1)*(4*pi*(r^2)); %define B in terms of y B= (-1/2)*N*int(y,r,0,Inf); %solve for B=0; solve(B,T) end This outputs: Code (Text): Warning: Explicit solution could not be found. > In solve at 81 In problemOne at 21 ans = [ empty sym ] I think the problem is in the integral, since Code (Text): int(y,r,0,Inf) yields Code (Text): Inf - limit(4*pi*r^3*exp(-1)*exp(4005180207889834777988627621265408/783018253290173*T/r^6)*exp(-23937547659622311621519348000222281120506532855808/783018253290173*T/r^12), r = 0, Right) What do I do? I thought I had a basic knowledge of Matlab (not an expert by any means), but this is confusing me to no end. If it is easier to use MathCAD, I do have access to that. I chose not to use it because I have less knowledge of it that I do of Matlab. Thanks, Nkk PS If a mod feels that this would be better suited to another homework section, please move. Again, my apologies of not knowing where to put it.