February 2019 0 89 Report
Które wyrazy ciągu (a_{n} ) są równe zeru?

a) a_{n} =  \frac{1}{4} n - \frac{1}{2}
b) a_{n} = 2n + 8
c) a_{n} = n^{2} - 8n + 15
d) a_{n} = n^{2} + 2n - 8
e) a_{n} =  \frac{27 - n^{3} }{n}
f) a_{n} =  \frac{( n^{2}- 4)(9- n^{2}) }{n+6}

Proszę o rozwiązanie z obliczeniami. Dam za to naj.
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