Question

Dada a função f: {-3, 2, 0, √5} --> R, definida pela fórmula f(x)=2x²+1. A sua imagem, será dada por: Im={19, 4, 11, 21} Im={19, 9, 1, 11} Im={13, 4, 10, 15} Im={9, 49, 3, 13} Im={29, 19, 1, 31}

Answer 1

f(x)= 2x²+1

f(-3)= 2.(-3)²+1= 2.9+1= 18+1= 19

f(2)= 2.2²+1= 2.4+1= 8+1=9

f(0)= 2.0²+1= 2.0+1=0+1=1

f(√5)= 2.(√5)²+1= 2.5+1= 10+1=11

Im= {19, 9, 1, 11}