Practice problem
Let f(x)=x2+x+1f(x) = x^2+x+1f(x)=x2+x+1. What is the minimum possible value of f(1−u)+f(1+u)f(1-u) + f(1+u)f(1−u)+f(1+u)?
666
777
888
999
Type a concept, like “slope” or “photosynthesis”.
