Let B denotes the set of all n-bit strings with weight k. a) Explain why the recursive equation |B = |B+B-1 holds for any k <3.b) List all the elements of B and B3 in the set notation.c) Compute |B| using part a) and b). Explain.

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Answered: a) Explain why the recursive equation…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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In c++ please help me answer this question I will give you a good rating :) implement the three versions of the addupto20() function: iterative, recursive, and divide-and-conquer approach test these functions with a few inputs from your main() Iterative solution * check if there exsits two numbers from vector data that add up to 20 e.g., if data=[2,5,3,15], the function returns true, as data [0] +data [3]==20 e.g., if data=[3,4,0,8], the function return false precondition: vector data has been initialized postcondition: if there are two numbers from list add up to 20, return true; otherwise, return false */ bool AddupTo20 (const vector‹int> & data){ } Come up with a recursive solution to the problem, following the hints given below: * check if there exsits two numbers from vector data[first...right] add up to 20 e.g., if data=[2,5,3,15], first=0, last=3, the function returns true, as data [0] +data [3]==20 e.g., if data=[2,5,3,15], first=2, last=3, the function returns…
Each case below gives a recursive definition of LS{a, b}*. Give a simple nonrecursive definiton of L in each case. Example: a e L; VXEL axE L can be defined as "The set of all non-empty strings that do not contain b." Handwriting solutions all three subparts 1. а€ L; VxєL ха,xbe L 2. ae L; VxeL bx,xbe L 3. а€ L; VxEL ax,xbє L
Give a recursive definition for the set of all strings of a’s and b’s that begins with an a and ends in a b. Say, S = { ab, aab, abb, aaab, aabb, abbb, abab..} Let S be the set of all strings of a’s and b’s that begins with a and ends in a b. The recursive definition is as follows – Base:... Recursion: If u ∈ S, then... Restriction: There are no elements of S other than those obtained from the base and recursion of S.
QUESTION 6 A proper recursive solution requires at least two parts: a recursive function that calls the recursive function with a smaller problem, and a base, or stopping case. O True O False
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a) Explain why the recursive equation |B = |B+ |B-1| holds for any k <3. b) List all the elements of B and B3 in the set notation. c) Compute |BŹ| using part a) and b). Explain. %3D