Question

Dada a função polinomial do 1o grau f(x) = 2x – 20, o valor de f(52) é igual a:

a) 64 b) 68 c) 72 d) 84

Answer 1

$\boxed{\begin{array}{l}\sf f(x)=2x-20\\\sf f(52)=2\cdot(52)-20\\\sf f(52)=104-20\\\sf f(52)=84\\\huge\boxed{\boxed{\boxed{\boxed{\sf\red{\maltese}~\blue{alternativa~d}}}}} \end{array}}$