3, 10, 24, 52, 108
3 10 24 52 108
+7 +14 +28 +56
*2 *2 *2
-206 + 94 1/2 = 94,5 - 206 = (-111,5) = (- 111 1/2)
4sin^2 x - 2 sin x * cos x - sin^2 x - cos ^2 x = 0 ( : cos^2 x)
4 tg^2x - 2 tg x - tg x - 1 = 0
tg x = l, x ≠ p/2 + pn, n ∈ Z
4l^2 - 3 l - 1 = 0
D= 9+ 16= 25;
x(1,2) = 3+5/8 = 1; 3-5/8 = -1/2;
tg x = 1;
x = p/4 + pm, m ∈ Z.
tg x = 1/2
x = arctg 1/2 + pk, k ∈ Z.
X*18=100-46
X*18=54
X=54:18
X=3
2)770:x=385*2
770:x=770
X=770:770
X=1
Ответ:
Пошаговое объяснение:
1) 0.28*(-3.5)=-0.98
0.462-(-0.98)=0.462+0.98=1.442
1.442:(-0.35)=-4.12
2) -3.3-1.5=-4.8
3.84:(-4.8)=-0.8
4.08-(-0.8)=4.08+0.8=4.88
3) -9.6+5.2=-4.4
-4.4*(-1.5)=6.6
6.6-6.7=-0.1
-0.1+1.3=1.2