1)1,7*3^2=1.7*9=15.3
2)2/3*12=8
3)15.3+8=23.3
4)23.3-15=8.3
Bn=b1^n-1*q
b4=b1^3*q=4^3*(-1/2)=64*(-1/2)=-32
Ответ:-32
<span>23841+х=514376</span>
<span>x=514376-23841</span>
<span>x=490535</span>
<span>
</span>
1)x+7=14 и -x+7=14. 2)y=-0,1 и y=0,1
x=14-7 -x=14-7
x=7 x=-7
P=(4+4)*2=16
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