Question

1) Qual o elemento do domínio de f(x)=4x-3, cuja imagem é 13:

a 4
b 0
c 2
d 3
e 1

Answer 1

$\Large\boxed{\begin{array}{l}\sf f(x)=4x-3~~~~f(x)=13\\\sf 4x-3=13\\\sf 4x=13+3\\\sf 4x=16\\\sf x=\dfrac{16}{4}\\\\\sf x=4\checkmark\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~a}}}}\end{array}}$