   Chapter 11.2, Problem 15ES ### Discrete Mathematics With Applicat...

5th Edition
EPP + 1 other
ISBN: 9781337694193

#### Solutions

Chapter
Section ### Discrete Mathematics With Applicat...

5th Edition
EPP + 1 other
ISBN: 9781337694193
Textbook Problem
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# Use the definition of Θ -notation to show that ⌊ n + 1 2 ⌋ is Θ ( n ) .

To determine

To show:

That n+12 is Θ(n) using the definition of Θ notation.

Explanation

Given information:

Let f(n)=n+12 and g(n)=n, for any integer n0.

Formula used:

Let f and g be real valued functions defined on the same nonnegative integers, with g(n)0 for every integer nr, where r is positive real number.

Then,

f is of order g, written f(n) is Θ(g(n)), if and only if, there exist positive real numbers A,B and kr such that

Ag(n)f(n)Bg(n) for every integer nk.

Proof:

Let f(n)=n+12 and g(n)=n, for any integer n0.

Hence,

For all n0, n+12>0 and n0

Then, n+120 and n0

Now, it is clear that f(n)0 and g(n)0

Let A=12 and

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