Respostas

2013-07-08T17:22:03-03:00
A) f (0)= e f(1)=4   e f(x)= ax+b
a x 0 + b = 4   .....  b=4

a+ b = 4

a + 4 = 4

a = 0


b) f(-1)= 2 e f(1)=-1 

-a + b = 2

a + b = -1

2b = 1

b= 1/2

a + 1/2 = -1

a = -1 - 1/2 = - 3/2

confere?