Question

Fie f:R->R, f(x)=5-x. Calculați f(0)×f(1)+....×f(10).​

Answer 1

Răspuns:

f(0)=5-0=5

f(1)=5-1=4

f(2)=3

f(3)=2

f(4)=1

f(5)=0

=>f(0)×f(1)×....×f(10)=0