Question 31: Find the appropriate conditions for digits a and b such that: \(- \overline {cab} <- \overline {c85}\)

We have:

\(- \overline {cab} < - \overline {c85} \Rightarrow \overline {cab} > \overline {c85} \Rightarrow \left\{ \begin{array}{l}a > 8\\1

So a>8;b>5

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