Respostas

2014-02-18T08:46:34-03:00
F(-1) = 5
f(3) = -3
f(0) = ...
xo = ...

ax+b = y
-a+b = 5

3a+b = -3

3a+b = -3
-a +b = 5  .(3)
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3a + b = -3
-3a +3b = 15
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........4b = 12
b = 12/4 --> b = 3

3a+b = -3
3a+3 = -3
3a = -3-3
3a = -6
a = -6/3
a = -2

y = ax+b
y = -2x+3
Cálculo de xo:
-2x+3 = 0
-2x = -3 .(-1)
2x = 3
x = 3/2