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 Jan 16, 2019
 #1
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+2

f(2)  =  12

 

The inverse to f  =    (x / 3)^(1/2)  = f -1

 

The derivative of this is    (1/3)(1/2)(x/3)^(-1/2)  = (1/6)(x /3)^(-1/2)

 

So   

 

df-1 / dx     at     f(2)   =  12   is

 

(1/6) (12/3)^(-1/2)  =

 

(1/6) ( 4)^(-1/2)  =

 

(1/6) / √4 =

 

(1 ) / ( 6 * 2)  =

 

1 /12

 

 

cool cool cool

 Jan 17, 2019

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