1) Consider the conquer and divide relation f(n) = 2f (n / 4) +9 with f(1) = 3. a. Considering only arguments for f(n) when n = 4k, for some integer k, provide an explicit formula for f(n). b. What is f(256)? What is the big-O estimate for f(n)? C.
1) Consider the conquer and divide relation f(n) = 2f (n / 4) +9 with f(1) = 3. a. Considering only arguments for f(n) when n = 4k, for some integer k, provide an explicit formula for f(n). b. What is f(256)? What is the big-O estimate for f(n)? C.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![### Problem 1: Analyzing a Conquer and Divide Relation
Consider the conquer and divide relation \( f(n) = 2f(n / 4) + 9 \) with \( f(1) = 3 \).
#### a. Explicit Formula for \( f(n) \)
Considering only arguments for \( f(n) \) when \( n = 4^k \) for some integer \( k \), provide an explicit formula for \( f(n) \).
---
#### b. Evaluate \( f(256) \)
What is \( f(256) \)?
---
#### c. Big-O Estimate for \( f(n) \)
What is the big-O estimate for \( f(n) \)?
---
In explanation:
- For part **a**, you need to derive the closed form for the given recursive relation assuming \( n \) can be expressed as \( 4^k \).
- For part **b**, substitute \( n = 256 \) in your closed form expression (or solve the recursion iteratively).
- For part **c**, use the Master Theorem for divide-and-conquer recurrences to determine the asymptotic complexity of \( f(n) \).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3eb514bb-44ba-433b-9221-45dffb06f396%2Fc5e1d94c-e157-445a-a926-4fd0d6344f27%2Fvkbkneb_processed.png&w=3840&q=75)
Transcribed Image Text:### Problem 1: Analyzing a Conquer and Divide Relation
Consider the conquer and divide relation \( f(n) = 2f(n / 4) + 9 \) with \( f(1) = 3 \).
#### a. Explicit Formula for \( f(n) \)
Considering only arguments for \( f(n) \) when \( n = 4^k \) for some integer \( k \), provide an explicit formula for \( f(n) \).
---
#### b. Evaluate \( f(256) \)
What is \( f(256) \)?
---
#### c. Big-O Estimate for \( f(n) \)
What is the big-O estimate for \( f(n) \)?
---
In explanation:
- For part **a**, you need to derive the closed form for the given recursive relation assuming \( n \) can be expressed as \( 4^k \).
- For part **b**, substitute \( n = 256 \) in your closed form expression (or solve the recursion iteratively).
- For part **c**, use the Master Theorem for divide-and-conquer recurrences to determine the asymptotic complexity of \( f(n) \).
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