10р+7q=-2 10p+7q=-2 <span> 10p+7q=-2 </span>
2p-22=5q 2p-5q=22(умнож. на -5) -10p+25q=-110
32q=-112, q=-112:32 q=-3.5 q=-3.5 q=-3.5
-10p+25*(-3.5)=-110 -10p=87.5-110 -10p=-22.5 p=22.5:10=2.25
Ответ:(-3.5;2.25)
<span>
</span>
Cos2arcsin1/3=1-2sin^2(arcsin1/3)=1-2×1/3^2=1-2×1/9=1-2/9=7/9
10 пар.......,................