Given f (x) = 3-1 and g(x) = x² + 2. Elijah was asked to find f (g(x)). He showed the following work:
Line 1: ſ (g(x)) = f (x + 2)
Line 2:
7
3(x2+2)
Line 3:
7
3x2+6
This answer is incorrect. Answer the following questions:
A. On which line did Elijah make a mistake? Justify your answer. (5
points)
B. Now show the correct way to solve this problem, showing all work
like Elijah did above. (5 points)

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)

1st integer x

2nd integer x+1

3rd integer x+2

4th integer x+3

x+x+1 +x+2+x+3 =74

combine like terms

4x+6 = 74

subtract 6 from each side

4x = 68

x = 17

the integers are 17,18,19,20