solve function can't solve an inequality

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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!
  1 Comment
Roberto Lemaitre
Roberto Lemaitre on 14 Oct 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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Accepted Answer

Mitchell Thurston
Mitchell Thurston on 15 Oct 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
  1 Comment
Walter Roberson
Walter Roberson on 15 Oct 2021
Nice find. I will have to remember that work-around for future.

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