Jaki jest wpływ związków fosforanowych ( w detergentach ) na środowisko?
a5=a1+q^{4} a3=a1+q^{2}
Δ=
t₁=
t₂=9
q=3 v q=
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a5=a1+q^{4} a3=a1+q^{2}
Δ=
t₁=
t₂=9
q=3 v q=