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The function $f(x)$ is defined only on domain $[-1,2]$, and is defined on this domain by the formula
f(x) = 2x^2-8x+1.
What is the range of $f(x)$? Express your answer as an interval or as a union of intervals.

 Jan 26, 2025
 #1
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2(-1)^2 -8(-1) + 1 =  11

 

2(2)^2 - 8(2) + 1 =  -7

 

The function is continuous on [ -1, 2]  so the range is  [  -7 , 11 ]

 

cool cool cool

 Jan 26, 2025

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