Question

dada a funçao f:R-R definida por f(x)=ax +b,calcular a e b sabendo que f(2)=6 e f(-2) =10

Answer 1

F(2) = ax + b    
F(2) = 2a + b
6 = 2a + b --> 6 = 2a + 10 + 2a -->  10 - 6 = 4a --> 4/4 = a --> a = 1   

F(-2) = ax + b
F(-2) = -2a + b
10 = -2a + b
b = 10 + 2a --> b = 10 + 2 --> b = 12