Math Problem Statement

Assume that each of the expressions below gives the processing time T(n) spent by an algorithm for solving a problem of size n. Select the dominant term(s) having the steepest increase in n and specify the lowest Big-Oh complexity of each algorithm.

Solution

The table in the exercise shows a list of expressions that represent processing times T(n)T(n) of algorithms for solving problems of size nn. The task is to find the dominant term(s) for each expression and specify the Big-O complexity based on that.

Let's go through each expression and determine the dominant term and its corresponding Big-O notation:

  1. Expression: 5+0.001n3+0.025n5 + 0.001n^3 + 0.025n

    • Dominant term: 0.001n30.001n^3
    • Big-O: O(n3)O(n^3)
  2. Expression: 500n+100n1.5+50nlog10n500n + 100n^{1.5} + 50n \log_{10} n

    • Dominant term: 100n1.5100n^{1.5}
    • Big-O: O(n1.5)O(n^{1.5})
  3. Expression: 0.3n+5n1.5+2.5n1.750.3n + 5n^{1.5} + 2.5 \cdot n^{1.75}

    • Dominant term: 2.5n1.752.5 \cdot n^{1.75}
    • Big-O: O(n1.75)O(n^{1.75})
  4. Expression: n2log2n+n(log2n)2n^2 \log_2 n + n (\log_2 n)^2

    • Dominant term: n2log2nn^2 \log_2 n
    • Big-O: O(n2logn)O(n^2 \log n)
  5. Expression: nlog3n+nlog2nn \log_3 n + n \log_2 n

    • Dominant term: nlog2nn \log_2 n
    • Big-O: O(nlogn)O(n \log n)
  6. Expression: 3log3n+log2log2log2n3 \log_3 n + \log_2 \log_2 \log_2 n

    • Dominant term: 3log3n3 \log_3 n
    • Big-O: O(logn)O(\log n)
  7. Expression: 100n+0.01n2100n + 0.01n^2

    • Dominant term: 0.01n20.01n^2
    • Big-O: O(n2)O(n^2)
  8. Expression: 0.01n+100n20.01n + 100n^2

    • Dominant term: 100n2100n^2
    • Big-O: O(n2)O(n^2)
  9. Expression: 2n+n0.5+0.5n1.252n + n^{0.5} + 0.5n^{1.25}

    • Dominant term: 0.5n1.250.5n^{1.25}
    • Big-O: O(n1.25)O(n^{1.25})
  10. Expression: 0.01nlog2n+n(log2n)20.01n \log_2 n + n(\log_2 n)^2

    • Dominant term: n(log2n)2n (\log_2 n)^2
    • Big-O: O(n(logn)2)O(n (\log n)^2)
  11. Expression: 100nlog3n+n3+100n100n \log_3 n + n^3 + 100n

    • Dominant term: n3n^3
    • Big-O: O(n3)O(n^3)
  12. Expression: 0.003nlog3n+log2log2n0.003n \log_3 n + \log_2 \log_2 n

    • Dominant term: 0.003nlog3n0.003n \log_3 n
    • Big-O: O(nlogn)O(n \log n)

Would you like more details or have any questions? Here are some follow-up questions to consider:

  1. How is the dominant term used to determine Big-O complexity?
  2. Why does the constant coefficient not matter in Big-O notation?
  3. What is the difference between O(nlogn)O(n \log n) and O(n(logn)2)O(n (\log n)^2)?
  4. Can two algorithms with different Big-O complexities ever have similar performance for small inputs?
  5. What is the significance of logarithmic terms like log2n\log_2 n in algorithm analysis?

Tip: When analyzing algorithms, focus on how terms behave as nn grows large, since Big-O notation is concerned with asymptotic behavior.

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Math Problem Analysis

Mathematical Concepts

Algorithm Analysis
Big-O Notation
Dominant Terms

Formulas

Big-O: O(f(n))
logarithmic terms: log(n), log_2(n), log_3(n)
power terms: n^k (polynomial growth)

Theorems

Big-O Complexity Theory
Dominant term selection in asymptotic analysis

Suitable Grade Level

Undergraduate - Computer Science