<span>{х-4≥0;
{х-0,3≥1;
</span>
<span><span>{х ≥ 4;
{х ≥1,3;</span>
</span> //////////////////////////
_______ [1,3]________[4]__________
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
О т в е т. х≥4
1) 10 * 5 ^ ( X - 1 ) = 10 * 5 ^ X * 5 ^ (-1) = 10 * 1/5 * 5 ^ X = 2 * 5 ^ X
2) 7 * 5 ^ ( X + 1 ) = 7 * 5 ^ X * 5 = 35 * 5 ^ X
3) ( 2 * 5 ^ X ) : ( 35 * 5 ^ X ) = 2 : 35 = 2/35
ОТВЕТ 2/35