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1. = sin²a+cos²a-cos²a+sin²a=2sin²a
2. -1≤sin6x≤1 -2 ≤2sin6x≤2
3. k=v'(3π/2) v'=6cosx-2sinx k=6cos(3π/2)-2sin(3π/2)=0-2(-1)=2
А)3 процента от x = 1,8
х - 100%
1,8 - 3%
х = 180/3 = 60
б)85℅от x=17
х - 100%
17 - 85%
х = 1700/85 = 20
в)130℅от x = 3.9
х - 100%
3.9 - 130%
х = 390/130 = 3
г)6.2 ℅от x = 9.3
х - 100%
9.3 - 6.2%
х = 930/6.2 = 150
20+8x-20=14x+12
8x-14x=12
-6x=12
x=-2
(x²-2y²)²=x⁴-4x²y²+4y⁴
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