Tīpoka ki ngā ihirangi matua
Kimi Pārōnaki e ai ki x_15
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Aromātai
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Tohaina

x_{15}^{1-1}
Ko te pārōnaki o ax^{n} ko nax^{n-1}.
x_{15}^{0}
Tango 1 mai i 1.
1
Mō tētahi kupu t mahue te 0, t^{0}=1.