Question

Dada a função de primeiro grau f (x)=2x+3, qual é o valor de f(2/5); f(3/5); f(8/3); f(1/9)?

Answer 1

f(2/5)=2*(2/5)+3
f(2/5)=4/5+3
f(2/5)=(4+15)/5
f(2/5)=19/5

f(3/5)=2*(3/5)+3
f(3/5)=6/5+3
f(3/5)=(6+15)/5
f(3/5)=21/5

f(8/3)=2*(8/3)+3
f(8/3)=16/3+39
f(8/3)=(16+9)/3
f(8/3)=25/3

f(1/9)=2*(1/9)+3
f(1/9)=2/9+3
f(1/9)=(2+27)/9
f(1/9)=29/9