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Mathematics
Blaine King
16 September, 17:36
What is the vale of f (-4)
f (x) = 5+2|x|
f (-4) =
+1
Answers (
1
)
Julianna Booker
16 September, 20:07
0
Answer: f (-4) = 13
Put the value of x = - 4 to the equation of the function:
f (x) = 5 + 2|x|
f (-4) = 5 + 2|-4| = 5 + 2 (4) = 5 + 8 = 13
|a| = a for a ≥ 0
examples: |3| = 3, |0.5| = 0.5, |123| = 123
|a| = - a for a < 0
examples: |-3| = - (-3) = 3, |-0.5| = - (-0.5) = 0.5, |-123| = 123
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