If $f(n) = n^2 + n + 17$, what is the value of $f(11)$?
To find the value of $f(11)$, I need to substitute $n = 11$ into the function definition and simplify. So I have $f(11) = (11)^2 + 11 + 17$. To simplify, I can use the order of operations and do the exponent first, then the addition. So I get $f(11) = 121 + 11 + 17$. Then I can add up the terms and get $f(11) = 149$. 