Rozwiąż równanie:
x+1 1
----- = -----
4x x-1
Klucz:
x E {2 - pierwiastek z 5, 2 + pierwiastek z 5}
x≠0 ∧ x-1≠0
x≠0 ∧ x≠1
D=R\{0,1}
(x+1)(x-1)=4x
x²-1=4x
x²-4x-1=0
Δ=(-4)²-4*1*(-1)Δ=16+4
Δ=20
√Δ=2√5
x₁=(-(-4)-2√5)/(2*1)
x₁=(4-2√5)/2
x₁=2-√5
x₂=(-(-4)+2√5)/(2*1)
x₂=(4+2√5)/2
x₂=2+√5
delta=16+4
delta==
x1=
x2=
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x≠0 ∧ x-1≠0
x≠0 ∧ x≠1
D=R\{0,1}
(x+1)(x-1)=4x
x²-1=4x
x²-4x-1=0
Δ=(-4)²-4*1*(-1)
Δ=16+4
Δ=20
√Δ=2√5
x₁=(-(-4)-2√5)/(2*1)
x₁=(4-2√5)/2
x₁=2-√5
x₂=(-(-4)+2√5)/(2*1)
x₂=(4+2√5)/2
x₂=2+√5
(x+1)(x-1)=4x
delta=16+4
delta==
x1=
x2=