......................................................
А) =(в¹/⁴с¹/⁴(в+с))/в⁵/⁴с⁵/⁴=(в+с)/вс=(2+5)/2*5=7/10=0,7
б) = (3²)³/²+(3³)²/³-16³/⁴=3³+3²-(2⁴)³/⁴=27+9-2³=36-8=28
<span>347/15=23 2/15</span>
<span>3271/32=102 7/32</span>
<span>437/24= 18 5/24</span>
<span>4389/43= 102 3/43</span>
Раскрываем скобки
2/5х-1,04-о,75=3,25
2/5х=5,04
х=50,4
2000*1,12=2240
5000*1,12=5600
8000*1,12=8960