А) 81^0,25=81^1/4=3
0,001^-2/3=(1/1000)^-2/3=1000^2/3=10^2=100
3+100=103
б) 16^0,5=16^1/2=4
(0,0625)^-0,75=(625/10000)^-3/4=(10000/625)^3/4=(10/5)^3=2^3=8
4-8=-4
в) (16/81)^0,25=(16/81)^1/4=2/3
27^-1/3=(1/27)^1/3=1/3
2/3 - 1/3=1/3
г) 6561^1/4=9
1024^0,1=1024^1/10=2
9+2=11
B1=5,b3=80,s5=?
b3=b1.qˇ2,qˇ2=b3/b1,qˇ2=80/5,qˇ2=16
q=V(16)=4,q=4
s5=b1.(qˇ5-1)/(q-1)
s5=5.(4ˇ5 -1)/(4-1)
s5=5.(1024-1)/3
s5=5.1023/3=5.341=1705
s5=1705
1) 6x-30=0
x=5
2) 8-4x=5
x=0,75
3) 5x-(7x+7)=9
x=-8