Określ dziedzinę funkcji :
Mianownik musi byc różny od 0
x + (1/2)x^2 = 0
x + 0,5x^2 = 0
x*(1 + 0,5x) = 0
x = 0 lub 1 + 0,5x = 0
x = 0 lub 0,5x = -1
x = 0 lub x = - 2
Odp. x musi byc róźne od 0 i -2 .
D = R \ { 0 ; -2 }
=========================================
x+1/2x²≠0
Δ=1²-4*1/2*0
Δ=1
√Δ=1
x₁=(-1-1)/(2*1/2)
x₁=-2/1
x₁=-2
x₂=(-1+1)/(2*1/2)
x₂=0
D=R\{-2,0}
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Mianownik musi byc różny od 0
x + (1/2)x^2 = 0
x + 0,5x^2 = 0
x*(1 + 0,5x) = 0
x = 0 lub 1 + 0,5x = 0
x = 0 lub 0,5x = -1
x = 0 lub x = - 2
Odp. x musi byc róźne od 0 i -2 .
D = R \ { 0 ; -2 }
=========================================
x+1/2x²≠0
Δ=1²-4*1/2*0
Δ=1
√Δ=1
x₁=(-1-1)/(2*1/2)
x₁=-2/1
x₁=-2
x₂=(-1+1)/(2*1/2)
x₂=0
D=R\{-2,0}