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Kubikrot

Kubikroten ur ett tal a, vilket skrivs är motsatsen till att multiplicera något tre gånger. Exempelvis är eftersom 222=8. Man kan också se kubikroten som motsatsen till "upphöjt till 3", dvs. dessa räkneoperationer tar ut varandra.

Till skillnad från kvadratroten kan man dra kubikroten ur negativa tal då produkten av tre negativa tal blir negativ, t.ex. (-2)(-2)(-2)=-8, dvs.

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