Discrete Mathematics and Its Applications, Seventh Edition

Published by McGraw-Hill Education
ISBN 10: 0073383090
ISBN 13: 978-0-07338-309-5

Chapter 2 - Section 2.4 - Sequences and Summations - Exercises - Page 167: 3

Answer

a) 2,3,5,9 b) 1,4,27,256 c) 0,0,1,1 d) 0,1,2,3

Work Step by Step

a) Given: $2^n+1$ Here, $a_0=2^0+1=2; a_1=2^1+1=3;a_2=2^2+1=5;a_3=2^3+1=9$ b) Given: $(n+1)^{n+1}$ Here, $a_0=(0+1)^{0+1}=1; a_1=(1+1)^{1+1}=4;a_2=(2+1)^{2+1}=27;a_3=(3+1)^{3+1}=256$ c) Given: $⌈ n/2⌉$ $a_0=⌈ n/2⌉=0; a_1=⌈ 1/2⌉=0;a_2=⌈2/2⌉=1;a_3=⌈3/2⌉=1$ d) Given: $⌈ n/2⌉+⌈ n/2⌉$ Here, we hvae $a_0=⌈ 0/2⌉+⌈0/2⌉=0; a_1=⌈1/2⌉+⌈1/2⌉=1;a_2=⌈2/2⌉+⌈2/2⌉=2;a_3=⌈3/2⌉+⌈3/2⌉=3$
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