Let the function f be defined by f(x)=x+1. If 2f(p)=20, what is the value of f(3p)? I got 30 but the correct answer is 28. Why? Thanks in advance
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Originally Posted by fabxx Let the function f be defined by f(x)=x+1. If 2f(p)=20, what is the value of f(3p)? I got 30 but the correct answer is 28. Why? Thanks in advance It is 28 because... f(x) = x +1 So, f(p) = p +1 2[f(p)] = 20 f(p) = 20/2 = 10 p +1 = 10 p = 9 f(3p) = 3p +1 = 3(9) +1 = 28
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