Question: Prove or disprove 1 . 5 n ^ 2 + 4 0 n + 1 0 0 = O ( n ^ 2 ) .

Prove or disprove
1.5n ^2+40n +100=O(n^2).
2. n ^3/1000= O(n ^2).
3.f(n)= sigma i^n=1 i 2. is f(n)=(n^3)?
4. n ^ k =(2^ n)
5. Sigma i^n =1 logi=(nlogn)
6.7^n=\Omega (9^n)

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