is a sequence of real numbers such that
prove that exist
such that for every
we have
.
%V0
$a_{0},\ a_{1},\ a_{2},\dots$ is a sequence of real numbers such that
$$a_{n + 1} = \left[a_{n}\right]\cdot \left\{a_{n}\right\}$$
prove that exist $j$ such that for every $i\geq j$ we have $a_{i + 2} = a_{i}$.