Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Trending News

Promoted
RICARDO B
RICARDO B asked in Ciências e MatemáticaMatemática · 1 decade ago

O valor máximo da função y = x² +5x-6 é:?

O valor máximo da função y = x² +5x-6 é:

a) 5 ⁄ 2

b) 2

c) 1⁄ 4

d) – 2

2 Answers

Rating
  • Maria Descartes
    Lv 7
    1 decade ago
    Favorite Answer

    Veja:

    y = x² +5x-6

    y'= 2x+5

    2x+5=0

    2x=-5

    x=-5/2

    f(-5/2)=(-5/2)² +5.(-5/2)-6

    f(-5/2)=25/4 -25/2-6

    f(-5/2)=(25-50-24)/4

    f(-5/2)=-49/4

    Ponto de máximo:

    (-5/2;-49/4)

    valor máximo :-49/4

  • jose Soh
    Lv 7
    1 decade ago

    x = -b/2a

    x = -5/2 = -2,5

    F(2,5) = 2,5² + 5x2,5 -6 = 6,25 + 12,5 -6 = 12,75

    nenhuma das alternativas

Still have questions? Get your answers by asking now.