1,248:(2,7х-15,6)=0,1
1,248=(2,7х-15,6)*0,1
1,248=0,27х-1,56
1,248+1,56=0,27х
2,808=0,27х
х=2,808:0,27
х=10,4
1)125х1/5^-845x1/13^=(125/1x1/25)-(845/1x1/165)=1/5-1/5=0
2) ПО формуле d=an+1-an;a1=27,a3-5,a9-?,d=11,11x9=99,27-99=-72
a9=-72
<span>2(х+3) - 6 =4 + 3(2х-2)
2x + 6 - 6 = 4 + 6x - 6
2x = 4 + 6x - 6
2x- 6x = 4-6
- 4x = -2
x = -2 : (-4)
x = 1/2</span>
100⁴=100*100*100*100=100000000
10^8=100000000