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Se considera functia f:R ->R, f(x) = x²-3x. Calculati f(1) · f(2) · f(3) · f(4)

Răspuns :

f(1)=1-3=-2
f(2)=4-6=-2
f(3)=9-9=0
f(4)=16-12=4
f(1)*f(2)*f(3)*f(4)=-2*(-2)*0*4=0
f:R→R ,f(x)=x²-3x

Pentru a putea calcula produsul f(1)*f(2)*f(3)*f(4) calculam pe rand fiecare:

f(1)=1-3=-2
f(2)=4-6=-2
f(3)=9-9=0
f(4)=16-12=4

inlcouim si obtinem: -2*(-2)*0*4=0