Zadania w Załączniku
.2
a)AvB=(-5,6> A∧B=<-3,4) A\B=(-5,-3)B\A=(-5; 6>
b) AvB=R A∧B=<0,4> A\B=(-∞,0) B\A=(4,∞)
c)AvB(-2,6) A∧B=(3,5> A\B=Ф B\A=(-2,3>v(5,6)
3.
a) <-2√3,3√2> b) <0,∞) c)<0,∞)
4.
a) |5-2π| 5-2π
b) |√3-1|=√3-1
c)|2-2√2|=2√2-2
d)|-7-12|-|5-13|=|-19|-|-8|=19-8=11
e)|2-3√3|-3|2+√3|=3√3-2-6-3√3=-8
5.
√(3-√2)²=|3-√2| √(x²-6x+9)²=|x²-6x+9| √(x²+2x+1)²=|x²+2x+1|
6.
|x|=5 x=5 x=-5
|x+4|=2 x=-2 x=-6
|x²-4x+4|=3 Δ=16-16=0 x=4/2=2 x∈R\{2} x²-4x+4=3 x²-4x+1 Δ=2√2 x=2+2√2 x=2-2√2
x∈{2} -x²+4x-4=3 -x²+4x-7=0 Δ≠-12
|x-1|≥2 x≥3 x≤-1 x∈(∞,-1><3,∞)
|x+3|<5 x<2 x>-8 x∈(-8,2)
|x|≤3√2 x≤3√2 x≥-3√2 x∈<-3√2,3√2>
|x+2|>6 x>4 x<-8 x∈(∞,8)(4,∞)
|x|<0 x<0 x>0 x∈R\{0}
|x-3|=-2 x=1 x=5
8.
a) 7 b) 5
9.a) 1,2,3,4, B)1,2,3,4,5,6,7 C)1,2,3,4
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.2
a)AvB=(-5,6> A∧B=<-3,4) A\B=(-5,-3)B\A=(-5; 6>
b) AvB=R A∧B=<0,4> A\B=(-∞,0) B\A=(4,∞)
c)AvB(-2,6) A∧B=(3,5> A\B=Ф B\A=(-2,3>v(5,6)
3.
a) <-2√3,3√2> b) <0,∞) c)<0,∞)
4.
a) |5-2π| 5-2π
b) |√3-1|=√3-1
c)|2-2√2|=2√2-2
d)|-7-12|-|5-13|=|-19|-|-8|=19-8=11
e)|2-3√3|-3|2+√3|=3√3-2-6-3√3=-8
5.
√(3-√2)²=|3-√2| √(x²-6x+9)²=|x²-6x+9| √(x²+2x+1)²=|x²+2x+1|
6.
|x|=5 x=5 x=-5
|x+4|=2 x=-2 x=-6
|x²-4x+4|=3 Δ=16-16=0 x=4/2=2 x∈R\{2} x²-4x+4=3 x²-4x+1 Δ=2√2 x=2+2√2 x=2-2√2
x∈{2} -x²+4x-4=3 -x²+4x-7=0 Δ≠-12
|x-1|≥2 x≥3 x≤-1 x∈(∞,-1><3,∞)
|x+3|<5 x<2 x>-8 x∈(-8,2)
|x|≤3√2 x≤3√2 x≥-3√2 x∈<-3√2,3√2>
|x+2|>6 x>4 x<-8 x∈(∞,8)(4,∞)
|x|<0 x<0 x>0 x∈R\{0}
|x-3|=-2 x=1 x=5
8.
a) 7 b) 5
9.a) 1,2,3,4, B)1,2,3,4,5,6,7 C)1,2,3,4