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Tohaina

8\left(-\frac{1}{2}\right)y^{8-1}
Ko te pārōnaki o ax^{n} ko nax^{n-1}.
-4y^{8-1}
Whakareatia 8 ki te -\frac{1}{2}.
-4y^{7}
Tango 1 mai i 8.