Question

ex 2 doi va rog
Dau coroniță, e urgent ​

Answer 1

Răspuns:

parabola y = ax²+bx+c, x∈R are varful

$V(x_{v} ,y_{v} ), \\x_{v} =\frac{-b}{2a} , \\y_{v} =\frac{-delta}{4a}, \\delta=b^{2} -4ac$

a) f(x)=2x²-4x+5

$x_{v} =\frac{-(-4)}{2*2} =\frac{4}{4} = 1$

$delta=b^{2} -4ac=(-4)^{2} -4*2*5=16-40=-24$

$y_{v} =\frac{-(-24)}{4*2} = \frac{24}{8} =3$

⇒ $V(x_{v} ,y_{v} ) = V(1,3)$

in mod asemenator le faci si celelalte subpuncte