Question

Let the function f be defined by
f(x) = x + 1. If 2f (p) = 20, what is the
value of f(3p)?
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Answer 1

given f(x)=x+1

then f(p)= p+1

then 2f(p) = 2p+2=20

2p=18

p=9

then 3p= 3*9=27

f(3p)=27 +1 =28

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