Unable to find explicit solution
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SOUVIK MITRA
on 22 Feb 2020
Commented: SOUVIK MITRA
on 25 Feb 2020
I am trying to find the value of tau when differentiation of f is zero.
syms tau;
mu_B = 1;
theta_BH = 1;
mu_H = 1;
theta_HB = 1;
f = (1/mu_B)*(2^(theta_BH/tau)-1)+(1/mu_H)*(2^(theta_HB/(1-tau))-1)*((1-tau)/tau);
k=diff(f);
solve(k==0);
Warning: Unable to find explicit solution. For options, see help.
and ans is 0x1 sym.
Can anybody tell me what is wrong in this procedure?
2 Comments
David Goodmanson
on 22 Feb 2020
Hi Souvik. probably there is nothing 'wrong' and expression is just too complicated to have an explicit solution. Hey, it happens.
Accepted Answer
Walter Roberson
on 22 Feb 2020
vpasolve(k==0, 0.5)
The starting guess can be anything from about 1e-3 upwards.
There are a minimum of 3 different roots of the equation:
0.6278431457
0.02697246510 + 0.2177554874i
0.02697246510 - 0.2177554874i
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