+0  
 
+1
203
2
avatar+1442 

Suppose that g(x)=f^{-1}(x). If g(-15)=0, g(0)=3, g(3)=9 and g(9)=20, what is f(f(9))?

 

Thanks!

 #1
avatar+87293 
+2

The inverse contains the points

 

 (-15.0), ( 0, 3), (3,9), (9,20)

 

So the original function contains the points

 

(0, -15), (3,0), (9,3), (20, 9)

 

So   f(9)  =   3

 

And    f(f(9)  =   f(3)      =    0

 

 

cool cool cool

CPhill  Dec 8, 2017
 #2
avatar+1442 
+2

Thanks!!


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