Question 3. [written question] Prove that $3n^3 + 20n^2 + 5$ is $O(n^3)$ using the definition of the $O(\dots)$ notation. You are required to show the steps in your inequality proof clearly. Hint: find the constants $c$ and $n_0$ such that $3n^3 + 20n^2 + 5 \le cn^3$ for all $n \ge n_0$.
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Step 1: We need to find constants c and n<sub>0</sub> such that 3n³ + 20n² + 5 ≤ cn³ for all n ≥ n<sub>0</sub>. Show more…
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