Calcule K real para que a função quadrática f(x) = -x2 + kx + 15 tenha o valor máximo igual a 16.... Pergunta de ideia deHachi

December 2019 1 22 Report

Calcule K real para que a função quadrática f(x) = -x2 + kx + 15 tenha o valor máximo igual a 16.

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discipulodethales O valor máximo de uma função é obtido através do Y do vértice:

Yv = -Δ/4a

A questão deseja saber o valor de K quando o Yv = 16, então:

16 = -Δ/4a

f(x) = -x² + kx + 15

a = -1
b = k
c = 15

16 = -(k² - 4 . -1 . 15)/4 . -1
k² + 60 = 64
k² = 4
k = ±4

Portanto, K pode assumir o valor de 4 ou o valor de -4.

Espero ter ajudado! DISCÍPULO DE THALES.

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Passe as frases abaixo para a forma interrogativa,trocando os nomes por pronomes. A) My friends and i am at the zoo every sunday. B)His children is at the mall now.

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Complete the sentences wuth the correct possessives. A) Jim has an old car. car is the same color as mine. B) Do you know jane? brother is a troublemaker. C) Mariana and tom are twins. birthday is in october. D) Those toys belong to them.The books are ,too.

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Passe as frases abaixo para a forma interrogativa,trocando os nomes por pronomes. A) My friends and i am at the zoo every sunday. B)His children is at the mall now.

1) Fill in the blanks with the correct indefinite article. A) ___ Object B) ___ Mountain C) ___ Square D) ___ Circle E) ___ Eye F) ___ Car G) ___ Oval H) ___ Body

Complete the sentences wuth the correct possessives. A) Jim has an old car.____ car is the same color as mine. B) Do you know jane?____ brother is a troublemaker. C) Mariana and tom are twins.____ birthday is in october. D) Those toys belong to them.The books are ____,too.

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