a) dam valori functiei
x -α 0 1 +α
f(x) 3 1
f(0)=3-2*0=3-0=3 si trecem in tabel
f(1)=3-2*1=3-2=1
b)f(0)=3-2*0=3-0=3
f(1)=3-2*1=3-2=1
f(2)=3-2*2=3-4=-1
f(3)=3-2*3=3-6=-3
.................................
f(16)=3-2*16=3-32=-29
S=(3-29)*16/2= -26 *8=- 208 semnul functiei este -