Question

Поможітьььь пжжжжжж 8 клас​

Answer 1

$f(x)=\sqrt{x}\\\\f(x-1)=\sqrt{x-1}\\\\f(x-1)=17 \ \Rightarrow \ \sqrt{x-1}=17\\\\(\sqrt{x-1})^{2} =17^{2}\\\\x-1=289\\\\\boxed{x=290}$