Cos2x<1/2
2x<+-пи/3 + 2пиn
x< +-пи/6 + пиn
10 в 5 степени = 10*10*10*10*10=100000.
0.1 в 7 степени = 0.1*0.1*0/1*0.1*0.1*0.1*0.1 = 0.0000001
100000*0.0000001=0.01
√25-√49= 5 - 7 = -2
√16 * √9 = 4 *3 =12
3√4 - √36 = √(3² · 4) - √36 =√36 -√36 = 6 - 6 =0
√64 : √ 900 = 8 : 30 = 8/30 = 4/15
1)х=2/12+5/12
х=7/12
2-)у= 3/16-15/16
-у=-3/4
у=3/4
3)z=11/19-7/19
z=4/19
4)p=18/25-7/25
p=11/25