OG详解-OG10 数学1 Q6

The correct answer is 77. It’s given that the function f is defined by f(x) = x² +x+71. Substituting 2 for x in function f yields f(2) = (2)² +2+71, which is equivalent to f(2) = 4+2+71, or f(2) = 77. Therefore, the value of (2) is 77.