Question: Please help me to solve this : (b) Prove that the function f(n) = 2n3 + 2n7/3 + log2 n + 5 is O(n3). (c)

Please help me to solve this :

(b) Prove that the function f(n) = 2n3 + 2n7/3 + log2 n + 5 is O(n3).

(c) Prove that the function f(n) = (log2 n)2 is O(n).

(d) Prove that the function f(n) = 2n+3 is (2n).

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