How can I solve an equation containing log ?

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Ketha Jaya Sandeep
Ketha Jaya Sandeep 2020-3-29
回答： Star Strider 2020-3-29
c=1692.19
m=260kg
k=91.23
x=100ft
(k*x/m)+v+(c/k)*ln((-kv+c)/c)=0
Find v ?
How to solve this equation in matlab?

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回答（1 个）

Star Strider
Star Strider 2020-3-29
Use the fsolve function, because it will return complex results, and since the argument to the log function is negative it will return a complex results for ‘v’, at least during the optimisation process.
Also see the documentation section on Anonymous Functions.
Alternatively, use the Symbolic Math Toolbox solve and vpa functions

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