Help with functions.?

1 ⤊

Let the function f be defined by f(x)=x+1. If 2f(p)=20, what is the value of f(3p)? I don't even get that...

2007-07-15 14:59:10 · 2 answers · asked by Team_Balla 3 in Science & Mathematics ➔ Mathematics

2f(p)=20
so f(p)=10
so p = 9

So f(3p)=f(27)=28

2007-07-15 15:03:10 · answer #1 · answered by tsr21 6 · 1⤊ 0⤋

f(x)= x+1
So, f(p) = p+1
2f(p) =2(p+1) = 20 so 2p+2 = 20 2p = 18 p = 9
f(3p) = f(9*3) =f(27) = 27+1 = 28

2007-07-15 22:07:45 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋