SOLUTION: Find f(2) for each function. Show all work. Justify and explain your reasoning. a) f(x) = - x + 3 b) f(x) = 2x^3 - 7x^2 + 8 c) f(x) = abs(x + 3) - 9 Note: abs(x + 3)

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Question 386990: Find f(2) for each function. Show all work. Justify and explain your reasoning.
a) f(x) = - x + 3
b) f(x) = 2x^3 - 7x^2 + 8
c) f(x) = abs(x + 3) - 9
Note: abs(x + 3) means the absolute value of the quantity x + 3.
Note: The ^ symbol means to the power.
Found 2 solutions by Alan3354, ewatrrr:
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
Find f(2) for each function. Show all work. Justify and explain your reasoning.
-------------
Sub 2 for each x.
a) f(x) = - x + 3
f(2) = -2 + 3
= 1
-------------
b) f(x) = 2x^3 - 7x^2 + 8
f(2) = 2*2^3 - 7*2^2 + 8
= 16 - 28 + 8
= -4
------------
c) f(x) = abs(x + 3) - 9
f(2) = |2 + 3| - 9 = 5-9
f(2) = -4
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!


Hi

Finding f(2) is the result of simply substituting the value of 2 for x

a) f(2) = - x + 3 = 1

b) f(2) = 2x^3 - 7x^2 + 8 = 16 -28 +8 = -4

c) f(x) = |x + 3| - 9 = 5 - 9 = -4



(note: absolute value sign is 'uppercase' \ on the key board) 

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