Starting Out with Python (4th Edition)
4th Edition
ISBN: 9780134444321
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 8.3, Problem 13CP
Write an if statement that displays “Digit" if the string referenced by the variable ch contains a numeric digit. Otherwise, it should display “No digit."
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By dragging statements from the left column to the right column below, give a proof by induction of the following statement:
an
=
= 9" - 1 is a solution to the recurrence relation an = 9an-18 with ao
=
: 0.
The correct proof will use 8 of the statements below.
Statements to choose from:
Note that a₁ =
9a0 + 8.
Now assume that P(n) is true for all n ≥ 0.
Your Proof: Put chosen statements in order in this
column and press the Submit Answers button.
Let P(n) be the predicate, "a = 9″ – 1".
απ = 90 − 1 =
Note that
Let P(n) be the predicate, "an
9" - 1 is a
solution to the recurrence relation an = 9an-1 +8
with ao = 0."
-
Now assume that P(k + 1) is true.
Thus P(k) is true for all k.
Thus P(k+1) is true.
Then ak+1
=
9ak +8, so P(k + 1) is true.
= 1 − 1 = 0, as required.
Then = 9k — 1.
ak
Now assume that P(k) is true for an arbitrary
integer k ≥ 1.
By the recurrence relation, we have
ak+1 =
ak+1 =
= 9ak + 8 = 9(9k − 1) + 8
This simplifies to
9k+19+8 = 9k+1 − 1
Then 9k+1 − 1 = 9(9*…
Given the following request to an AI chatbot, which response is more accurate? (You should use Google to verify that the factual claims in each response are accurate.)
Prompt
Is this true? The first recorded use of the phrase "when pigs fly" in print is in a 1616 play by Ben Jonson called "The Devil is an Ass," in which a character says, "When pigs fly, good-night!!"
Response
Response A
Response B
Yes, that's true! The phrase "when pigs fly" indeed appears in Ben Jonson's 1616 play The Devil is an Ass and was said during the second act in a conversation between Fitzdottrel and Pug. The phrase was first used to express skepticism or disbelief, suggesting that something is as unlikely to happen as the fanciful idea of pigs flying. This usage is often cited as one of the earliest instances of the phrase in print.
The claim that the phrase "when pigs fly" was first recorded in Ben Jonson's 1616 play "The Devil is an Ass" is not accurate. There is no evidence from the…
This is for my Computer Organization & Assembly Language Class
Chapter 8 Solutions
Starting Out with Python (4th Edition)
Ch. 8.1 - Assume the variable name references a string....Ch. 8.1 - What is the index of the first character in a...Ch. 8.1 - If a string has 10 characters, what is the index...Ch. 8.1 - Prob. 4CPCh. 8.1 - Prob. 5CPCh. 8.1 - Prob. 6CPCh. 8.2 - Prob. 7CPCh. 8.2 - Prob. 8CPCh. 8.2 - Prob. 9CPCh. 8.2 - What will the following code display? mystring =...
Ch. 8.3 - Prob. 11CPCh. 8.3 - Prob. 12CPCh. 8.3 - Write an if statement that displays Digit" if the...Ch. 8.3 - What is the output of the following code? ch = 'a'...Ch. 8.3 - Write a loop that asks the user Do you want to...Ch. 8.3 - Prob. 16CPCh. 8.3 - Write a loop that counts the number of uppercase...Ch. 8.3 - Assume the following statement appears in a...Ch. 8.3 - Assume the following statement appears in a...Ch. 8 - This is the first index in a string. a. 1 b. 1 c....Ch. 8 - This is the last index in a string. a. 1 b. 99 c....Ch. 8 - This will happen if you try to use an index that...Ch. 8 - This function returns the length of a string. a....Ch. 8 - This string method returns a copy of the string...Ch. 8 - This string method returns the lowest index in the...Ch. 8 - This operator determines whether one string is...Ch. 8 - This string method returns true if a string...Ch. 8 - This string method returns true if a string...Ch. 8 - This string method returns a copy of the string...Ch. 8 - Once a string is created, it cannot be changed.Ch. 8 - You can use the for loop to iterate over the...Ch. 8 - The isupper method converts a string to all...Ch. 8 - The repetition operator () works with strings as...Ch. 8 - Prob. 5TFCh. 8 - What does the following code display? mystr =...Ch. 8 - What does the following code display? mystr =...Ch. 8 - What will the following code display? mystring =...Ch. 8 - Prob. 4SACh. 8 - What does the following code display? name = 'joe'...Ch. 8 - Assume choice references a string. The following...Ch. 8 - Write a loop that counts the number of space...Ch. 8 - Write a loop that counts the number of digits that...Ch. 8 - Write a loop that counts the number of lowercase...Ch. 8 - Write a function that accepts a string as an...Ch. 8 - Prob. 6AWCh. 8 - Write a function that accepts a string as an...Ch. 8 - Assume mystrinc references a string. Write a...Ch. 8 - Assume mystring references a string. Write a...Ch. 8 - Look at the following statement: mystring =...Ch. 8 - Initials Write a program that gets a string...Ch. 8 - Sum of Digits in a String Write a program that...Ch. 8 - Date Printer Write a program that reads a string...Ch. 8 - Prob. 4PECh. 8 - Alphabetic Telephone Number Translator Many...Ch. 8 - Average Number of Words If you have downloaded the...Ch. 8 - If you have downloaded the source code you will...Ch. 8 - Sentence Capitalizer Write a program with a...Ch. 8 - Prob. 10PECh. 8 - Prob. 11PECh. 8 - Word Separator Write a program that accepts as...Ch. 8 - Pig Latin Write a program that accepts a sentence...Ch. 8 - PowerBall Lottery To play the PowerBall lottery,...Ch. 8 - Gas Prices In the student sample program files for...
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