См. приложение
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A<b<c
a+n<b+n<c+n
ka<kb<kc (k>0)
mc<mb<ma (m<0)
3<a<4
15<5a<20
-4<-a<-3
5<a+2<6
1<a-2<2
1<5-a<2
3.6<0.2a+3<3.8
a-3>b-3
a>b>4<u>>0</u>
7a>7b
a>b>1<u>>0</u>
a-8>b-8
<u>0></u>-12>a>b
-2a>-2b
a<b<-0.3<u><0</u>
2sin^2x-5sin 2x cos 2x+2cos^2x=0;2tq²2x - 5tq2x +2 =0 ;
tq²2x - (1/2+2)tq2x +1 =0 ;
[ tq2x =1/2 ; tq2x =2 .
[ 2x=arctq(1/2) +πn ; [ 2x=arctq2 +πn , n∈Z .
x₁=(1/2)*arctq(1/2) +(π/2)*n , n∈Z ; x₂=(1/2)*arctq2 +(π/2)*n, n∈Z .
ответ : (1/2)*arctq(1/2) +(π/2)*n , (1/2)*arctq2 +(π/2)*n, n∈Z .
100+10=110% – стоимость нового стола
1760:110=16 - 1%
16х100=1600 гривен.