30x-11= 30/x
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回答（2 个）
Ameer Hamza
2020-10-7
If you want to solve this equation for x, then you have the following two methods to do it in MATLAB.
1) If you have symbolic toolbox
syms x
eq = 30*x-11 == 30/x;
sol = solve(eq);
2) Your equation is a polynomial (for 
). You can use roots()
). You can use roots()% polynomial is 30x^2-11x-30=0
cf = [30 -11 -30];
sol = roots(cf);
Simple numeric solution:
>> fun = @(x) 30*x - 11 - 30./x;
>> x = fzero(fun,pi)
x =
1.2000
Checking:
>> 30*x-11
ans =
25
>> 30/x
ans =
25
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