Question: Please help with 8 9 and 10. 8.4 points) Prove that x2 + 3x-10 is (N2). This actually involves two proofs. (Lipshutz HW 3) 9.
Please help with 8 9 and 10. 
8.4 points) Prove that x2 + 3x-10 is (N2). This actually involves two proofs. (Lipshutz HW 3) 9. (4 points, 2 points each) Assuming that fi(n) is Ogi()) and fa(n) is O(g2(n)): (Drozdek, p.71) a. Find a counterexample to refute thatfi(n) -f(n) is O(gi(n) - gz(n) by supplying fi, f2, gi, and g2. b. Find a counterexample to refute thatfi(n) fs(n) is O(g(n) /g2(n) by supplyingfafa gl, and g2. 10, (2 points) Show that log(n + 1) = 0(log n). (Heileman p.28)
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