Question

Dada a função F(x)=ax+b,sabendo que:
a) F(2)=3 e F(1)=4 , calcule F(6)

Answer 1

f(2)=2.a+b=3
f(1)=1.a+b=4

2a+b=3
a+b=4

2a+b=3
-a-b=-4
______
a+0=-1 

a=-1

a+b=4
-1+b=4
b=4+1
b=5

f(x)=-x+5

f(6)=-(6)+5
f(-6)=-6+5
f(-6)=-1