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range 5x2−2x
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Solution
f(x)≥−15
+1
Interval Notation
[−15,∞)
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Function range definition
The set of values of the dependent variable for which a function is defined
Vertex of 5x2−2x:Minimum (15,−15)
For a parabola ax2+bx+cwith Vertex (xv,yv) If a<0the range is f(x)≤yv If a>0the range is f(x)≥yv a=5,Vertex (xv,yv)=(15,−15)