Asked by John

f:R→R is a function satisfying f(2x+1)=4x^2+4x. So what is the value of f(12)?
Answered by Steve
if 2x+1 = 12, x = 11/2
So, f(12) = 4(11/2)^2 + 4(11/2) = 121+22 = 143
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