Tīpoka ki ngā ihirangi matua
Kimi Pārōnaki e ai ki Σ_2
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Aromātai
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Tohaina

Σ_{2}^{1-1}
Ko te pārōnaki o ax^{n} ko nax^{n-1}.
Σ_{2}^{0}
Tango 1 mai i 1.
1
Mō tētahi kupu t mahue te 0, t^{0}=1.