A * b = - 3 * (- 2) + 7 * (- 11) = 6 - 77 = - 71
<span>b3,если q=0.1 и S=10
S=b1/(1-q) => b1=S*(1-q)
b3</span>=b1*q^2=<span>S*(1-q)*</span>q^2 = 10*(1-0,1)*0,1^2 = <span>
0,09
</span>
*****************
b5,если q=0.2 и S=5;
аналогично
<span>b1=S*(1-q)
b5=</span>b1*q^4=S*(1-q)*q^4 = 5*(1-0,2)*0,2^4 = <span>
0,0064
</span>
= 6,3х-4-21,6х-0,9 = -15,3х-4,9
1. (x-5)^+4x=25
X^-10x+25+4x=25
x^-6x=0
x(x-6)=0
X=0 или x=6
2.6x(0,5+3x)-15x%=0
3x+18x-15x^=0
3x-15x^+18x=0
x(3-5x+6)=0
x=0 или
3-5x+6=0
3-5x=-6
5x=9
x=9/5