Question

dada a função F (x)= ax+ b e sabendo se que f (3)=5 e F (-2) =-5 calcule F (1/2)

Answer 1

f(x)=ax+b

f(3)=3a+b=5
f(-2)=-2a+b=-5

3a+b=5
-2a+5=-5(-1)

3a+b=5
2a-b=5
______
5a=10
a=10/5
a=2

3.2+b=5
6+b=5
b=5-6
b=-1

f(x)=2x-1

f(1/2)=2.(1/2)-1
f(1/2)=2/2-1
f(1/2)=1-1
f(1/2)=0