= 2M*(1 - 2M) \ M - 3
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0.6X^2 - X - 0.4 = 0
D = 1 - 4*0.6 *(-0.4) = 1 + 0.96 = 1.96 V D = 1.4
X1 = 1 + 1.4 \ 1.2 = 2
X2 = 1 - 1.4 \ 1.2 = - 1\3
1-cos(α)=2sin^2(α/2)
sin(α/2) = +-sqrt((1-cosα)/2)
sin(α/2) = +-sqrt((1+0,28)/2)=+-sqrt(1,28/2)=+-sqrt(0,64)=+-0,8
π/2<α<π => π/4<α/2<π/2 => sqrt(2)/2 < sin(α/2) <1 => sin(α/2)=0,8
2x+3y=6, 6x+5y=2
1)(0, 2)
2.0+3.2=0+6=6, 6.0+5.2=0+10=10 net rešeniem
2)(2,-2)
2.2+3(-2)=4-6=-2 net rešeniem
3)(4,-3)
2.4+3.(-3)=8-9=-1 net rešeniem
4)(-3,4)
2.(-3)+3.4=-6+12=6, 6.(-3)+5.4=-18+20=2 ect rešeniem
Otvet: 4)(-3,4)