4-1 Recurrence examples Give asymptotic upper and lower bounds for T (n) in each of the following recur- rences. Assume that T(n) is constant for n < 2. Make your bounds as tight as possible, and justify your answers. a. T(n) = 2T(n/2) + nª. b. T(n) = T(7n/10) + n. c. T(n) = 167(n/4) +n². d. T(n) = 7T(n/3) + n². e. T(n) = 7T(n/2) + n². %3D f. T(n) = 2T(n/4) + n. %3D g. T(n) = T(n – 2) + n².

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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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4-1 Recurrence examples
Give asymptotic upper and lower bounds for T (n) in each of the following recur-
rences. Assume that T(n) is constant for n < 2. Make your bounds as tight as
possible, and justify your answers.
а. Т(п)
2T (n/2) +n*.
b. T(n) = T(7n/10) +n.
c. T(n) = 167T (n/4) +n2.
d. T(n) = 7T(n/3) + n2.
e. T(n) = 7T(n/2) +n2.
f. T(n) = 2T (n/4) + n.
g. T(n) = T(n – 2) + n2.
Transcribed Image Text:4-1 Recurrence examples Give asymptotic upper and lower bounds for T (n) in each of the following recur- rences. Assume that T(n) is constant for n < 2. Make your bounds as tight as possible, and justify your answers. а. Т(п) 2T (n/2) +n*. b. T(n) = T(7n/10) +n. c. T(n) = 167T (n/4) +n2. d. T(n) = 7T(n/3) + n2. e. T(n) = 7T(n/2) +n2. f. T(n) = 2T (n/4) + n. g. T(n) = T(n – 2) + n2.
108
Chapter 4 Divide-and-Conquer
4-3 More recurrence examples
Give asymptotic upper and lower bounds for T(n) in each of the following recur-
rences. Assume that T(n) is constant for sufficiently small n. Make your bounds
as tight as possible, and justify your answers.
a. T(n) = 4T(n/3) +n lg n.
b. T(n) = 3T(n/3) +n/lg n.
c. T(n) = 4T(n/2) + n² /n.
d. T(n) = 3T(n/3 – 2) +n/2.
e. T(n) = 2T(n/2) + n/lg n.
f. T(n) = T(n/2) + T (n/4) + T(n/8) +n.
g. T(n) = T(n- 1) + 1/n.
h. T(n) = T(n – 1) + lgn.
i. T(n) = T(n – 2) + 1/ lg n.
j. T(n) = nT(/n) +n.
Transcribed Image Text:108 Chapter 4 Divide-and-Conquer 4-3 More recurrence examples Give asymptotic upper and lower bounds for T(n) in each of the following recur- rences. Assume that T(n) is constant for sufficiently small n. Make your bounds as tight as possible, and justify your answers. a. T(n) = 4T(n/3) +n lg n. b. T(n) = 3T(n/3) +n/lg n. c. T(n) = 4T(n/2) + n² /n. d. T(n) = 3T(n/3 – 2) +n/2. e. T(n) = 2T(n/2) + n/lg n. f. T(n) = T(n/2) + T (n/4) + T(n/8) +n. g. T(n) = T(n- 1) + 1/n. h. T(n) = T(n – 1) + lgn. i. T(n) = T(n – 2) + 1/ lg n. j. T(n) = nT(/n) +n.
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