solve function can't solve an inequality

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Roberto Lemaitre
Roberto Lemaitre 2021-10-14
评论： Walter Roberson 2021-10-15
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 2021-10-14
编辑：Walter Roberson 2021-10-15
[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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采纳的回答

Mitchell Thurston
Mitchell Thurston 2021-10-15
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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