Question

graficul functiei f:R-R, f(x)=-2x2++5x-1

Answer 1

f(1)=-2•1•2+5•1-1
=-2•2+5-1
=-4+4
=0=>A(1;-0)
f(0)=-2•0•2+5•0-1
=0•2+0-1
=0-1
=-1=>B(0;-1)
Acum reprezinti grafic functia ...si duci dreapa care trece prin ambele puncte..:)