The graph of an exponential function of the form  f(x) = abx  passes through  (1, 2)  and  (2, 1).  Find  f(−2).   f(−2) =

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter4: Exponential And Logarithmic Functions
Section4.2: The Natural Exponential Function
Problem 1E: The function f(x)=ex is called the___________ Exponential function. The number eis approximately...
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The graph of an exponential function of the form 

f(x) = abx

 passes through 

(1, 2)

 and 

(2, 1).

 Find 

f(−2).

 

f(−2) =
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