Răspuns :
f(x) = -x+8
f(-2014)×f(-2013)×...×f(2013)×(2014) =
= f(-2014)×f(-2013)×...×f(8)×...×f(2013)×(2014) =
= f(-2014)×f(-2013)×...×0×...×f(2013)×(2014) = 0
f(-2014)×f(-2013)×...×f(2013)×(2014) =
= f(-2014)×f(-2013)×...×f(8)×...×f(2013)×(2014) =
= f(-2014)×f(-2013)×...×0×...×f(2013)×(2014) = 0