Question

Sabendo que f(x − 1) = x2 – k, determine k, sabendo que f(−3) = 7

Answer 1

$\Large\boxed{\begin{array}{l}\sf f(x-1)=x^2-k\\\sf f(-2-1)=(-2)^2-k\\\sf f(-3)=4-k\\\sf 4-k=7\\\sf k=4-7\\\sf k=-3\end{array}}$