Question

dada a função real f (x) =3x-2 calcule o a) f(0) b) f(-1) c) f(2) d) X de modo que f(x) =0

Answer 1

f (x) =3x - 2

Calcule o:
 
a) f(0)
f(x) = 3x - 2
f(0) = 3.0 - 2
f(0) = - 2

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b) f(-1)
f(x) = 3x - 2
f(-1) = 3.(-1) - 2
f(-1) = - 3 - 2
f(-1) = - 5

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
c) f(2)

f(x) = 3x - 2
f(2) = 3.2 - 2
f(2) = 6 - 2
f(2) = 4


¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
d) X de modo que f(x) =0

f(x) = 3x - 2
0 = 3x - 2
2 = 3x
3x = 2
x = 2/3