Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
1st Edition
ISBN: 9780078682278
Author: McGraw-Hill, Berchie Holliday
Publisher: Glencoe/McGraw-Hill
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Chapter 1.2, Problem 32E
To determine

To find: f(12) .

Expert Solution & Answer
Check Mark

Answer to Problem 32E

  12

Explanation of Solution

Given information: g(x)=1x2[fg][x]=x4+x21+x2 

Calculation:

Since, [fg][x]=f(g(x))

Therefore, x4+x21+x2=f(g(x))

To find f(12) , we have to guess the numerator and denominator f(x) .

Let’s assume the denominator to be (1+x) . Plug g(x) in and we get,

  1+(1x2)=2x2

This value is not equal to the denominator of [fg][x] .

Let’s assume the denominator to be (1x) . Plug g(x) in and we get,

  1(1x2)=x2

This value is not equal to the denominator of [fg][x] .

Let’s assume the denominator to be (2x) . Plug g(x) in and we get,

  2(1x2)=1x2

Since, this value is equal to the denominator of [fg][x] . Thus, the denominator of f(x) is 2x .

Similarly, numerator of f(x) can be determined.

Let’s assume the numerator to be (1+x) . Plug g(x) in and we get,

  1+(1x2)=2x2

This value is not equal to the numeratorof [fg][x] .

Let’s assume the numeratorto be x2 to get the power 4. Plug g(x) in and we get,

  (1x2)4=12x2+x4

This value is not equal to the numeratorof [fg][x] .

Let’s assume the numeratorto be (x2+3x) to get 3x. Plug g(x) in and we get,

  (1x2)2+3(1x2)=12x2+x4+33x2=x45x2+4

This value is not equal to the numeratorof [fg][x] .

Let’s assume the numeratorto be (x23x) to reverse the sign. Plug g(x) in and we get,

  (1x2)23(1x2)=12x2+x43+3x2=x4+x22

This value is not equal to the numeratorof [fg][x] .

Let’s assume the numeratorto be (x23x+2) to remove +2. Plug g(x) in and we get,

  (1x2)23(1x2)+2=12x2+x43+3x2+2=x4+x2

Since, this value is equal to the numeratorof [fg][x] . Thus, the numerator of f(x) is x23x+2 .

So, the function f(x) can be written as follows:

  f(x)=x23x+22x

Put x=12 in the above function, and evaluate f(12) as shown below.

  f(12)=(12)23(12)+22(12)=(14)(32)+22(12)=(14)(64)+(84)(42)(12)=(34)(32)=12

Therefore, f(12) is 12 .

Chapter 1 Solutions

Advanced Mathematical Concepts: Precalculus with Applications, Student Edition

Ch. 1.1 - Prob. 11CFUCh. 1.1 - Prob. 12CFUCh. 1.1 - Prob. 13CFUCh. 1.1 - Prob. 14CFUCh. 1.1 - Prob. 15CFUCh. 1.1 - Prob. 16CFUCh. 1.1 - Prob. 17ECh. 1.1 - Prob. 18ECh. 1.1 - Prob. 19ECh. 1.1 - Prob. 20ECh. 1.1 - Prob. 21ECh. 1.1 - Prob. 22ECh. 1.1 - Prob. 23ECh. 1.1 - Prob. 24ECh. 1.1 - Prob. 25ECh. 1.1 - Prob. 26ECh. 1.1 - Prob. 27ECh. 1.1 - Prob. 28ECh. 1.1 - Prob. 29ECh. 1.1 - Prob. 30ECh. 1.1 - Prob. 31ECh. 1.1 - Prob. 32ECh. 1.1 - Prob. 33ECh. 1.1 - Prob. 34ECh. 1.1 - Prob. 35ECh. 1.1 - Prob. 36ECh. 1.1 - Prob. 37ECh. 1.1 - Prob. 38ECh. 1.1 - Prob. 39ECh. 1.1 - Prob. 40ECh. 1.1 - Prob. 41ECh. 1.1 - Prob. 42ECh. 1.1 - Prob. 43ECh. 1.1 - Prob. 44ECh. 1.1 - Prob. 45ECh. 1.1 - Prob. 46ECh. 1.1 - Prob. 47ECh. 1.1 - Prob. 48ECh. 1.1 - Prob. 49ECh. 1.1 - Prob. 50ECh. 1.1 - Prob. 51ECh. 1.1 - Prob. 52ECh. 1.1 - Prob. 53ECh. 1.1 - Prob. 54ECh. 1.1 - Prob. 55ECh. 1.1 - Prob. 56ECh. 1.1 - Prob. 57ECh. 1.2 - Prob. 1GCECh. 1.2 - Prob. 2GCECh. 1.2 - Prob. 3GCECh. 1.2 - Prob. 4GCECh. 1.2 - Prob. 5GCECh. 1.2 - Prob. 1CFUCh. 1.2 - Prob. 2CFUCh. 1.2 - Prob. 3CFUCh. 1.2 - Prob. 4CFUCh. 1.2 - Prob. 5CFUCh. 1.2 - Prob. 6CFUCh. 1.2 - Prob. 7CFUCh. 1.2 - Prob. 8CFUCh. 1.2 - Prob. 9CFUCh. 1.2 - Prob. 10CFUCh. 1.2 - Prob. 11ECh. 1.2 - Prob. 12ECh. 1.2 - Prob. 13ECh. 1.2 - Prob. 14ECh. 1.2 - Prob. 15ECh. 1.2 - Prob. 16ECh. 1.2 - Prob. 17ECh. 1.2 - Prob. 18ECh. 1.2 - Prob. 19ECh. 1.2 - Prob. 20ECh. 1.2 - Prob. 21ECh. 1.2 - Prob. 22ECh. 1.2 - Prob. 23ECh. 1.2 - Prob. 24ECh. 1.2 - Prob. 25ECh. 1.2 - Prob. 26ECh. 1.2 - Prob. 27ECh. 1.2 - Prob. 28ECh. 1.2 - Prob. 29ECh. 1.2 - Prob. 30ECh. 1.2 - Prob. 31ECh. 1.2 - Prob. 32ECh. 1.2 - Prob. 33ECh. 1.2 - Prob. 34ECh. 1.2 - Prob. 35ECh. 1.2 - Prob. 36ECh. 1.2 - Prob. 37ECh. 1.2 - Prob. 38ECh. 1.2 - Prob. 39ECh. 1.3 - Prob. 1CFUCh. 1.3 - Prob. 2CFUCh. 1.3 - Prob. 3CFUCh. 1.3 - Prob. 4CFUCh. 1.3 - Prob. 5CFUCh. 1.3 - Prob. 6CFUCh. 1.3 - Prob. 7CFUCh. 1.3 - Prob. 8CFUCh. 1.3 - Prob. 9CFUCh. 1.3 - Prob. 10CFUCh. 1.3 - Prob. 11CFUCh. 1.3 - Prob. 12ECh. 1.3 - Prob. 13ECh. 1.3 - Prob. 14ECh. 1.3 - Prob. 15ECh. 1.3 - Prob. 16ECh. 1.3 - Prob. 17ECh. 1.3 - Prob. 18ECh. 1.3 - Prob. 19ECh. 1.3 - Prob. 20ECh. 1.3 - Prob. 21ECh. 1.3 - Prob. 22ECh. 1.3 - Prob. 23ECh. 1.3 - Prob. 24ECh. 1.3 - Prob. 25ECh. 1.3 - Prob. 26ECh. 1.3 - Prob. 27ECh. 1.3 - Prob. 28ECh. 1.3 - Prob. 29ECh. 1.3 - Prob. 30ECh. 1.3 - Prob. 31ECh. 1.3 - Prob. 32ECh. 1.3 - Prob. 33ECh. 1.3 - Prob. 34ECh. 1.3 - Prob. 35ECh. 1.3 - Prob. 36ECh. 1.3 - Prob. 37ECh. 1.3 - Prob. 38ECh. 1.3 - Prob. 39ECh. 1.3 - Prob. 40ECh. 1.3 - Prob. 41ECh. 1.3 - Prob. 42ECh. 1.3 - Prob. 43ECh. 1.3 - Prob. 44ECh. 1.3 - Prob. 45ECh. 1.3 - Prob. 46ECh. 1.3B - Prob. 1GCECh. 1.3B - Prob. 2GCECh. 1.3B - Prob. 3GCECh. 1.4 - Prob. 1CFUCh. 1.4 - Prob. 2CFUCh. 1.4 - Prob. 3CFUCh. 1.4 - Prob. 4CFUCh. 1.4 - Prob. 5CFUCh. 1.4 - Prob. 6CFUCh. 1.4 - Prob. 7CFUCh. 1.4 - Prob. 8CFUCh. 1.4 - Prob. 9CFUCh. 1.4 - Prob. 10CFUCh. 1.4 - Prob. 11ECh. 1.4 - Prob. 12ECh. 1.4 - Prob. 13ECh. 1.4 - Prob. 14ECh. 1.4 - Prob. 15ECh. 1.4 - Prob. 16ECh. 1.4 - Prob. 17ECh. 1.4 - Prob. 18ECh. 1.4 - Prob. 19ECh. 1.4 - Prob. 20ECh. 1.4 - Prob. 21ECh. 1.4 - Prob. 22ECh. 1.4 - Prob. 23ECh. 1.4 - Prob. 24ECh. 1.4 - Prob. 25ECh. 1.4 - Prob. 26ECh. 1.4 - Prob. 27ECh. 1.4 - Prob. 28ECh. 1.4 - Prob. 29ECh. 1.4 - Prob. 30ECh. 1.4 - Prob. 31ECh. 1.4 - Prob. 32ECh. 1.4 - Prob. 33ECh. 1.4 - Prob. 34ECh. 1.4 - Prob. 35ECh. 1.4 - Prob. 1MCQCh. 1.4 - Prob. 2MCQCh. 1.4 - Prob. 3MCQCh. 1.4 - Prob. 4MCQCh. 1.4 - Prob. 5MCQCh. 1.4 - Prob. 6MCQCh. 1.4 - Prob. 7MCQCh. 1.4 - Prob. 8MCQCh. 1.4 - Prob. 9MCQCh. 1.4 - Prob. 10MCQCh. 1.5 - Prob. 1CFUCh. 1.5 - Prob. 2CFUCh. 1.5 - Prob. 3CFUCh. 1.5 - Prob. 4CFUCh. 1.5 - Prob. 5CFUCh. 1.5 - Prob. 6CFUCh. 1.5 - Prob. 7CFUCh. 1.5 - Prob. 8CFUCh. 1.5 - Prob. 9CFUCh. 1.5 - Prob. 10CFUCh. 1.5 - Prob. 11CFUCh. 1.5 - Prob. 12ECh. 1.5 - Prob. 13ECh. 1.5 - Prob. 14ECh. 1.5 - Prob. 15ECh. 1.5 - Prob. 16ECh. 1.5 - Prob. 17ECh. 1.5 - Prob. 18ECh. 1.5 - Prob. 19ECh. 1.5 - Prob. 20ECh. 1.5 - Prob. 21ECh. 1.5 - Prob. 22ECh. 1.5 - Prob. 23ECh. 1.5 - 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Prob. 17ECh. 1.7 - Prob. 18ECh. 1.7 - Prob. 19ECh. 1.7 - Prob. 20ECh. 1.7 - Prob. 21ECh. 1.7 - Prob. 22ECh. 1.7 - Prob. 23ECh. 1.7 - Prob. 24ECh. 1.7 - Prob. 25ECh. 1.7 - Prob. 26ECh. 1.7 - Prob. 27ECh. 1.7 - Prob. 28ECh. 1.7 - Prob. 29ECh. 1.7 - Prob. 30ECh. 1.7 - Prob. 31ECh. 1.7 - Prob. 32ECh. 1.7 - Prob. 33ECh. 1.7 - Prob. 34ECh. 1.7 - Prob. 35ECh. 1.7 - Prob. 36ECh. 1.7 - Prob. 37ECh. 1.8 - Prob. 1CFUCh. 1.8 - Prob. 2CFUCh. 1.8 - Prob. 3CFUCh. 1.8 - Prob. 4CFUCh. 1.8 - Prob. 5CFUCh. 1.8 - Prob. 6CFUCh. 1.8 - Prob. 7CFUCh. 1.8 - Prob. 8CFUCh. 1.8 - Prob. 9ECh. 1.8 - Prob. 10ECh. 1.8 - Prob. 11ECh. 1.8 - Prob. 12ECh. 1.8 - Prob. 13ECh. 1.8 - Prob. 14ECh. 1.8 - Prob. 15ECh. 1.8 - Prob. 16ECh. 1.8 - Prob. 17ECh. 1.8 - Prob. 18ECh. 1.8 - Prob. 19ECh. 1.8 - Prob. 20ECh. 1.8 - Prob. 21ECh. 1.8 - Prob. 22ECh. 1.8 - Prob. 23ECh. 1.8 - Prob. 24ECh. 1.8 - Prob. 25ECh. 1.8 - Prob. 26ECh. 1.8 - Prob. 27ECh. 1.8 - Prob. 28ECh. 1.8 - Prob. 29ECh. 1.8 - Prob. 30ECh. 1.8 - Prob. 31ECh. 1.8 - Prob. 32ECh. 1 - Prob. 1SGACh. 1 - Prob. 2SGACh. 1 - Prob. 3SGACh. 1 - Prob. 4SGACh. 1 - Prob. 5SGACh. 1 - Prob. 6SGACh. 1 - Prob. 7SGACh. 1 - Prob. 8SGACh. 1 - Prob. 9SGACh. 1 - Prob. 10SGACh. 1 - Prob. 11SGACh. 1 - Prob. 12SGACh. 1 - Prob. 13SGACh. 1 - Prob. 14SGACh. 1 - Prob. 15SGACh. 1 - Prob. 16SGACh. 1 - Prob. 17SGACh. 1 - Prob. 18SGACh. 1 - Prob. 19SGACh. 1 - Prob. 20SGACh. 1 - Prob. 21SGACh. 1 - Prob. 22SGACh. 1 - Prob. 23SGACh. 1 - Prob. 24SGACh. 1 - Prob. 25SGACh. 1 - Prob. 26SGACh. 1 - Prob. 27SGACh. 1 - Prob. 28SGACh. 1 - Prob. 29SGACh. 1 - Prob. 30SGACh. 1 - Prob. 31SGACh. 1 - Prob. 32SGACh. 1 - Prob. 33SGACh. 1 - Prob. 34SGACh. 1 - Prob. 35SGACh. 1 - Prob. 36SGACh. 1 - Prob. 37SGACh. 1 - Prob. 38SGACh. 1 - Prob. 39SGACh. 1 - Prob. 40SGACh. 1 - Prob. 41SGACh. 1 - Prob. 42SGACh. 1 - Prob. 43SGACh. 1 - Prob. 44SGACh. 1 - Prob. 45SGACh. 1 - Prob. 46SGACh. 1 - Prob. 47SGACh. 1 - Prob. 48SGACh. 1 - Prob. 49SGACh. 1 - Prob. 50SGACh. 1 - Prob. 51SGACh. 1 - Prob. 52SGACh. 1 - Prob. 53SGACh. 1 - Prob. 54SGACh. 1 - Prob. 55SGACh. 1 - Prob. 56SGACh. 1 - Prob. 57SGACh. 1 - Prob. 58SGACh. 1 - Prob. 59SGACh. 1 - Prob. 60SGACh. 1 - Prob. 61SGACh. 1 - Prob. 62SGACh. 1 - Prob. 63SGACh. 1 - Prob. 64SGACh. 1 - Prob. 65SGACh. 1 - Prob. 66SGACh. 1 - Prob. 67SGACh. 1 - Prob. 68SGACh. 1 - Prob. 69SGACh. 1 - Prob. 1SAPCh. 1 - Prob. 2SAPCh. 1 - Prob. 3SAPCh. 1 - Prob. 4SAPCh. 1 - Prob. 5SAPCh. 1 - Prob. 6SAPCh. 1 - Prob. 7SAPCh. 1 - Prob. 8SAPCh. 1 - Prob. 9SAPCh. 1 - Prob. 10SAP
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