Question

Dada a função afim f(x) = -2x + 3, determine.

a) f(2)=

b) f(0)=

c) f(-3)

d) f( 10)=

e)f(1/2)=

f) o valor de x para f(x) = -35

Answer 1

Resposta:

$f(x) = - 2x + 3 \\ \\ a)f(2) = - 2 \times 2 + 3 = - 4 + 3 = - 1 \\ \\ b)f(0) = - 2 \times 0 + 3 = 0 + 3 = 3 \\ \\ c)f( - 3) = - 2 \times ( - 3) + 3 = 6 + 3 = 9 \\ \\ d)f(10) = - 2 \times 10 + 3 = - 20 + 3 = - 17 \\ \\ e)f (\frac{1}{2} )= - 2 \times \frac{1}{2} + 3 = \frac{ - 2}{2} + 3 = - 1 + 3 = 2 \\ \\ f(x) = - 35 = > - 2x + 3 = 35 \\ - 2x = 35 - 3 \\ 2x = 32 \\ x = \frac{32}{2} \\ x = 16$