Wyznacz wzór ogólny ciągu arytmetycznego (an) jeżeli a1=9 i różnica r= -8
a1 = 9
r = -8
an = a1 + (n - 1) * r
an = 9 + (n - 1) * (-8)
an = 9 - 8n + 8
an = 17 - 8n ----------- odpowiedź
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a1 = 9
r = -8
an = a1 + (n - 1) * r
an = 9 + (n - 1) * (-8)
an = 9 - 8n + 8
an = 17 - 8n ----------- odpowiedź