Consider the following recurrence relation. - {²(0-1) + 0² if n=0 (a) Compute the first eight values of P(n). (Enter your answers as a comma-separated list of values ordered with respect to increasing n.) 1,2,6,15,31,56,92,141,205 eBook P(n) = (b) Analyze the sequences of differences. (Enter your answers as first differences: 4,9,16,25,36,49,64 second differences: X third differences: 5.7.9.11.13.15 2,2,2,2,2 X What does this suggest about the closed form solution? X This suggests that the closed form will have degree 3 X (c) Find a good candidate for a closed-form solution. 1+ n(n+1) (2n+1) P(n) = 6 (d) Prove that your candidate solution is the correct closed-form solution. (Induction on n.) Let f(n) = comma-separated list of values ordered with respect to increasing n.) Base Case: If n = 0, the recurrence relation says that P(0) = 1, and the formula says that f(0) = Inductive Hypothesis: Suppose as inductive hypothesis that P(k-1) = Inductive Step: Using the recurrence relation, P(K) = P(k-1) + k², by the second part of the recurrence relation + k², by inductive hypothesis so, by induction, P(n) = f(n) for all n ≥ 0. for some k > 0. so they match.
Consider the following recurrence relation. - {²(0-1) + 0² if n=0 (a) Compute the first eight values of P(n). (Enter your answers as a comma-separated list of values ordered with respect to increasing n.) 1,2,6,15,31,56,92,141,205 eBook P(n) = (b) Analyze the sequences of differences. (Enter your answers as first differences: 4,9,16,25,36,49,64 second differences: X third differences: 5.7.9.11.13.15 2,2,2,2,2 X What does this suggest about the closed form solution? X This suggests that the closed form will have degree 3 X (c) Find a good candidate for a closed-form solution. 1+ n(n+1) (2n+1) P(n) = 6 (d) Prove that your candidate solution is the correct closed-form solution. (Induction on n.) Let f(n) = comma-separated list of values ordered with respect to increasing n.) Base Case: If n = 0, the recurrence relation says that P(0) = 1, and the formula says that f(0) = Inductive Hypothesis: Suppose as inductive hypothesis that P(k-1) = Inductive Step: Using the recurrence relation, P(K) = P(k-1) + k², by the second part of the recurrence relation + k², by inductive hypothesis so, by induction, P(n) = f(n) for all n ≥ 0. for some k > 0. so they match.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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