Question

Dada a função f(x)=-2x +1, calcule:
a)f(-1) b)f(2) c)f(x)=0

Answer 1

f(x) = -2x + 1

f(-1) = -2(-1) + 1
f(-1) = 3

f(2) = -2 (2) +1
f(2) = -3



f(x) = 0
f(x) = -2(x) + 1 = 0 
-2x + 1 = 0
-2x = -1  x(-1)
2x = 1
x = 1/2