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07-12-2017
Mathematics

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For the function f(x) = x + 9, find (f o f-1)(5) A. 14 B. 5 C. -5 D. 25

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behdeen2ozqekq behdeen2ozqekq

08-12-2017

f-1:
y=x+9
y-9=x
x-9=f-1
f-1(14)=14-9=5 f-1(5)=5-9=-4 f-1(-5)=-5-9=-14 f-1(25)=25-9=16
f(14)=14+9=24 f(5)=5+9=14 f(-5)=9-5=4 f(25)=25+9=34

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