Question

URGENTE!!!
1- Seja a função definida por f(x) = -6x + 2. Determine:


a) f(1) + f(3 )

b) f(-2) – f(-1)​

Answer 1

a)

$f(1) = - 6 \times 1 + 2 \\ f(1) = - 4 \\ \\ f(3) = - 6 \times 3 + 2 \\ f(3) = - 16 \\ \\ f(1) + f(3) = - 4 + ( - 16) \\ f(1) + f(3) = - 20$

b)

$f( - 2) = - 6 \times ( - 2) + 2 \\ f( - 2) = 14 \\ \\ f( - 1) = - 6 \times ( - 1) + 2 \\ f( - 1) = 8 \\ \\ f( - 2) - f( - 1) = 14 - 8 \\ f( - 2) - f( - 1) =6$