fie functia f: {-1 0 1 2} f(x)= -x•2+1

Răspuns :

f(-1)=-(-1)x2+1
f(-1)=1x2+1
f(-1)=2+1
f(-1)=3

f(0)=-0x2+1
f(0)=1

f(1)=-1x2+1
f(1)=-2+1
f(1)=-1

f(2)=-2x2+1
f(2)=-4+1
f(2)=-3

Bafta