<span>10 : x+6=0
10 :х=0-6
10:х=-6
х=10: (-6)
х=-1,67</span>
17) (Log(5) 36 + Log(5) 2 - Log(5) 8) * Log(9) 1/25 = Log(5) (36*2/8) * (-2Log(9) 5) = -Log(5) 9 * 2/Log(5) 9 = -2
18)
F(1)=-1,5*1=-1,5;
f(2)=-1,5*2=-3;
f(3)=-1,5*3=-4,5;
f(4)=-1,5*4=-6.
x y
1 -1,5
2 -3
3 -4,5
4 -6
-1,5-3-4,5-6=-15.
Ответ: -15.