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Suppose the graph of y = f(x) includes the points (1,-5), (2,3) and (3,-1). 
Based only on this information, there are two points that must be on the graph of y = f(f(x)) . If we call those points (a,b) and (c,d) what is ab + cd?

 Jun 22, 2021
 #1
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+1

Reflect points, 2,3 and 3,-1 over 1,-5.  so the other two points are 0,3 and  -1,-1 so the answer would be 0+1 so 1

 Jun 22, 2021
edited by Krxzy  Jun 22, 2021
edited by Krxzy  Jun 22, 2021

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