2^2x+2^(2x+4)-2^(2x+2)≥52
2^2x*(1+16-4)≥52
2^2x*13≥52
2^2x≥4
2x≥2
x≥1
x∈[1;∞)
sin(π/3-x)=1/2
cos(x+π/6)=1/2
x+π/6=-π/3+2πn U x+π/6=π/3+2πn
x=-π/6-π/3+2πn U -π/6+π/3+2πn
x=-π/2+2πn U x=π/6+2πn
6,38+7,62=14
40,27*14=563,78
47,45+9,25=56,7
56,7/21=2,7
563,78-2,7=561,08
<span>2,85*0,5+4,6*0,5-3,05=0,675
1)2,85*0,5=1,425
2)4,6*0,5=2,3
3)1,425+2,3=3,725
4)3,725-3,05=0,675</span>
Х/9=1000-910
х/9=90
х=90*9
х=810
100/х=2430-2030
100/х=100
х=100:100
х=1
100:х=2430-2420
100:х=10
х=100:10
х=10