Question

Fie functia f:R->R, f(x)=x-3
Aflati f(-4)•f(-3)•…•f(3)•f(4)

Answer 1

Răspuns:

f(-4)=-4-3=-7

f(-3)=-3-3=-6

.....

f(3)=3-3=0

f(4)=4-3=1

f(-4)*f(-3)*...*f(3)*f(4)=

-7*(-6)*...*0*1=

= 0

Orice inmultit cu 0 da 0

Answer 2

f(3)=0 toata inmultirea da 0