Question

1 - Calcule o zero da função: y = 6x –126

2 - Dada a função f(x) = 5x – 2, qual o valor da expressão abaixo?

ALGUÉM ME SOCORRE AQUI PFVR

Answer 1

Oie, td bom?

$1 - y = 6x - 126\\\\y = 6x - 126\\\\0 = 6x - 126\\\\6x = 126\\\\x = \frac{126}{6}\\\\x = 21\\\\\\\\2 - x => 4, (-2), 0\\\\\\f(4) = 5.4 - 2 = \\f(4) = 20 - 2 =\\f(4) = 18\\\\f(-2) = 5.(-2) - 2 =\\f(-2) = -10 - 2 =\\f(-2) = -12\\\\f(0) = 5.0 - 2 = \\f(0) = 0 - 2 = \\f(0) = -2\\\\Assim => \\\\\\\frac{18 + (-12)}{-2} = \\ \\\frac{6}{-2} = -3$

Espero ter ajudado...tchau e bons estudos!!