The table time (z.) 1 2 3 4 5 6 infections (y = f(x)) 32 37 34 48 53 69 depicts the number of newly infected individuals with a contagious, airborne disease at intervals of 1 day over a period of 6 days. Here i=0, 1,2,...,5 and the quantities zo = 1 and yo 32, respectively, represent the end of the first day of testing for the disease, and number of positive tests conducted by the end of that day. (Note: z, represents the end of a testing day, where the values of z, are as tabulated, while y, represents the number of positive tests conducted by the end of day x..) Page 4 of 5 (a) Construct a forward difference table for the above data. (b) (i) Use the table presented in (a), along with Newton's forward difference formula, to approximate f(7) with a polynomial of degree 3, P₁(a). Start with a = 1. (ii) Estimate the error in the approximation in (b)(i).

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Please answer the first 3 questions
Question 3:
Instruction: Apply one decimal place rounding to calculations where applicable.
The table
u
time (z.)
1 2 3 4 5 6
infections (y = f(x)) 32 37 34 48 53 69
depicts the number of newly infected individuals with a contagious, airborne disease at
intervals of 1 day over a period of 6 days. Here i = 0, 1, 2, ..., 5 and the quantities zo = 1
and yo 32, respectively, represent the end of the first day of testing for the disease, and
number of positive tests conducted by the end of that day.
(Note: az, represents the end of a testing day, where the values of x, are as tabulated, while
y represents the number of positive tests conducted by the end of day x..)
Page 4 of 5
(a) Construct a forward difference table for the above data.
(b) (i) Use the table presented in (a), along with Newton's forward difference formula, to
approximate f(7) with a polynomial of degree 3, P3(r). Start with = 1.
(ii) Estimate the error in the approximation in (b)(i).
(c) (i) Use the table presented in (a), along with Newton's backward difference formula, to
approximate f(7) with a polynomial of degree 3, Qa(r). Start with ₁ = 6.
(ii) Estimate the error in the approximation in (c) (i).
(d) State whether P3(x) and Q3(r) give over or under approximations for f(7).
Transcribed Image Text:Question 3: Instruction: Apply one decimal place rounding to calculations where applicable. The table u time (z.) 1 2 3 4 5 6 infections (y = f(x)) 32 37 34 48 53 69 depicts the number of newly infected individuals with a contagious, airborne disease at intervals of 1 day over a period of 6 days. Here i = 0, 1, 2, ..., 5 and the quantities zo = 1 and yo 32, respectively, represent the end of the first day of testing for the disease, and number of positive tests conducted by the end of that day. (Note: az, represents the end of a testing day, where the values of x, are as tabulated, while y represents the number of positive tests conducted by the end of day x..) Page 4 of 5 (a) Construct a forward difference table for the above data. (b) (i) Use the table presented in (a), along with Newton's forward difference formula, to approximate f(7) with a polynomial of degree 3, P3(r). Start with = 1. (ii) Estimate the error in the approximation in (b)(i). (c) (i) Use the table presented in (a), along with Newton's backward difference formula, to approximate f(7) with a polynomial of degree 3, Qa(r). Start with ₁ = 6. (ii) Estimate the error in the approximation in (c) (i). (d) State whether P3(x) and Q3(r) give over or under approximations for f(7).
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