Question

Escreva a função afim f (x)=ax+b,sabendo-se que f (1)=6 e f (2)=12

Answer 1

F(1): a.1 +6
F(1): 1a+6
F(1): 1a=6
F(1): a=6÷1= 6

F(2): 2a + 12
F(2): 2a+12
F(2): 2a=12
F(2); a=12÷2
F(2): a=6

Answer 2

f(x) = ax + b; f(1) = 6; f(1) = a.1+b; 6 = a+b; a+b = 6; b = 6 - a; f(2)= 12; f(2) = 2a+b; 12= 2a +b; 2a + b = 12; 2a + 6- a = 12; a+6= 12; a= 12-6; a= 6; a + a + b = 12; a +6= 12; a= 12-6; a= 6; a+ b = 6; 6+b = 6; b = 0; f(x) = 6x + 0; f(x) = 6x