Consider the following recurrence relation: P(n) = {. P(n-1) + 1 Prove by induction that P(n) = 50 - 1 if n = 0 if n > 0. (Induction on n.) Let f(n)=5n-1₁ Base Case: If n = 0, the recurrence relation says that P(0) = 0, and the formula says that f(0) = for all n ≥ 0. Inductive Hypothesis: Suppose as inductive hypothesis that P(k-1) = 5 Inductive Step: Using the recurrence relation, P(K) 5. P(k-1) + 1, by the second part of the recurrence relation - 5k-5 +4 5k-1 4 1, by inductive hypothesis so, by induction, P(n) = f(n) for all n ≥ 0. for some k> 0. 4 ✓ , 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
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Consider the following recurrence relation:
= {S. P(n − 1) + 1
if n = 0
if n > 0.
Prove by induction that P(n) = 5n -¹ for all n ≥ 0.
(Induction on n.) Let f(n) = 50 - 1₁
P(n) =
Base Case: If n = 0, the recurrence relation says that P(0) = 0, 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) 5. P(k-1) + 1, by the second part of the recurrence relation
= 5
= 5k-5 +4
1
4
+ 1, by inductive hypothesis
so, by induction, P(n) = f(n) for all n ≥ 0.
for some k> 0.
, so they match.
Transcribed Image Text:Consider the following recurrence relation: = {S. P(n − 1) + 1 if n = 0 if n > 0. Prove by induction that P(n) = 5n -¹ for all n ≥ 0. (Induction on n.) Let f(n) = 50 - 1₁ P(n) = Base Case: If n = 0, the recurrence relation says that P(0) = 0, 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) 5. P(k-1) + 1, by the second part of the recurrence relation = 5 = 5k-5 +4 1 4 + 1, by inductive hypothesis so, by induction, P(n) = f(n) for all n ≥ 0. for some k> 0. , so they match.
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