Respostas

2016-08-22T00:58:57-03:00
 f(x) = 3x² - 4x + 1

a) f(1) = 3 (1)² - 4 (1) + 1 = 3 - 4 + 1 = 0

b) f(0) = 3 (0)² - 4 (0) + 1 = 1

c) f(-2) = 3 (-2)² - 4 (-2) + 1 = 12 + 8 + 1 = 21

d) f(h+1) = 3 (h+1)² - 4 (h+1) + 1 =

= 3(h
²+2h+1) -4h -4 + 1 =

= 3h²+6h+3 -4h -3 =

= 3h² + 2h

e) f(x) = 1

3x² - 4x + 1 = 1

3x² - 4x  = 0

x (3x - 4) = 0

x = 0 e 
3x - 4 = 0
x = 4/3

R: x = 0 e x = 4/3
3 2 3