Arrange the following functions in increasing asymptotic order: A. n1/3 B. en…

2008

Arrange the following functions in increasing asymptotic order:

A. n1/3

B. en

C. n7/4

D. n log9n

E. 1.0000001n

  1. A.

    A, D, C, E, B

  2. B.

    D, A, C, E, B

  3. C.

    A, C, D, E, B

  4. D.

    A, C, D, B, E

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Correct answer: A

Final increasing asymptotic order: n^(1/3), n·log_9(n), n^(7/4), 1.0000001^n, e^n

  • log_9(n) = (ln n)/(ln 9), so n·log_9(n) = Θ(n log n).

  • Compare polynomials: for exponents a<b, n^a = o(n^b). Thus n^(1/3) = o(n^(7/4)).

  • Compare n·log n and n^(7/4): n·log n = n·(log n) and n^(7/4) = n·n^(3/4). Since n^(3/4) grows faster than log n, n·log n = o(n^(7/4)).

  • Exponentials dominate polynomials: for any constant a>1, a^n = ω(n^k) for every fixed k. Therefore 1.0000001^n outgrows n^(7/4).

  • Among exponentials, larger base → faster growth, so 1.0000001^n = o(e^n).

Combining these facts gives the increasing order: n^(1/3) < n·log_9(n) < n^(7/4) < 1.0000001^n < e^n.

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