Question

O vértice de parábola é o ponto de máximo ou mínimo da função. O vértice da parábola descrita pela função f(x)=x²-4x+3 está representada no item: a) V(2, 1) b) V(2, -1) c) V(-2, 1) d) V(-2, -1)

Answer 1

$x_v=-\dfrac{b}{2a}\\\\\\x_v=-\dfrac{-4}{2(1)}\\\\\\x_v=\dfrac{4}{2}\\\\\\\boxed{x_v=2}\\\\\\\\\\y_v=-\dfrac{\Delta}{4a}\\\\\\y_v=-\dfrac{b^2-4\cdot{a}\cdot{c}}{4a}\\\\\\y_v=-\dfrac{(-4)^2-4\cdot1\cdot3}{4(1)}\\\\\\y_v=-\dfrac{16-12}{4}\\\\\\\boxed{y_v=-1}\\\\\\\\\\\text{Par ordenado:}\ (2,\ -1)\\\\\text{Alternativa a)}$

Answer 2

Resposta:

A) V (2,1)

Explicação passo-a-passo: