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solve function can't solve an inequality

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Roberto Lemaitre
Roberto Lemaitre el 14 de Oct. de 2021
Comentada: Walter Roberson el 15 de Oct. de 2021
Hello, i'm trying to solve an inequality with the solve command but it gives me an error that tells me it can't solve my equation. Any alternatives to solve or does someone know how to overcome the error? thanks in advance!
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Roberto Lemaitre
Roberto Lemaitre el 14 de Oct. de 2021
Editada: Walter Roberson el 15 de Oct. de 2021
[0 < 320/9 - k/9, 0 < (9*k + (k/9 - 320/9)*(k - 41))/(k/9 - 320/9), 0 < k]
This is the inequality in text form.

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Mitchell Thurston
Mitchell Thurston el 15 de Oct. de 2021
I'm able to get a solution with defining k as a real symbolic variable
syms k real
ineqs = [0 < 320/9 - k/9, 0 < (9*k + (k/9 - 320/9)*(k - 41))/(k/9 - 320/9), 0 < k];
A = solve(ineqs, k, 'ReturnConditions', true);
Where A.conditions returns
x < 36*5^(1/2) + 140 & 140 - 36*5^(1/2) < x
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Walter Roberson
Walter Roberson el 15 de Oct. de 2021
Nice find. I will have to remember that work-around for future.

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