Question

Dada a função f (x) = - 5x + 4 calcule a f(-3) b f(5) c f(0) d f(-6)

Answer 1

vamos là:

Explicação passo-a-passo:

Vamos lá

Resolução :

f ( X ) = X² - 5X + 4

__________________

f ( 0 ) = 0² - 5 ( 0 ) + 4

f ( 0 ) = 0 - 0 + 4

f ( 0 ) = 0 + 4

f ( 0 ) = 4

___________________

f ( - 1 ) = - 1² - 5 ( - 1 ) + 4

f ( - 1 ) = - 1 - 5 + 4

f ( - 1 ) = - 1 + 9

f ( - 1 ) = 8

___________________

f ( 4 ) = 4² - 5 ( 4 ) + 4

f ( 4 ) = 16 - 20 + 4

f ( 4 ) = - 4 + 4

f ( 4 ) = 0

___________________

f ( - 2 ) = - 2² - 5 ( - 2 ) + 4

f ( - 2 ) = - 4 + 10 + 4

f ( - 2 ) = 6 + 4

f ( - 2 ) = 10