Question

sa se calculeze f(A),daca :A={1/2 1/2} ;f(x)=x²-2x +3|2

Answer 1

Presupun ca A={-1/2,1/2}
Inlocuim in f(x):
f(x)=x^2-2x+3/2

Cum A=1/2=> f(A)=1/4-2•1/2+3/2
f(A)=1/4-1+3/2
Amplificam si avem:
f(A)=(1-4+6)/4 => f(A)=3/4

Cum A=-1/2 => f(A)=1/4-2•(-1/2)+3/2
f(A)=1/4+1+3/2
Amplificam si avem:
f(A)=(1+4+6)/4 => f(A)=11/4

Bafta!