OG详解-OG8 数学2 Q7

The correct answer is 68. It’s given that the function f is defined by f(x)= 8x³ +4.  Substituting 2 for x in this equation yields f(2)= 8(2)³ +4, or f(2)= 8(8) +4, which is equivalent to f(2)= 68. Therefore, the value of f(2) is 68.