Find the general term $(n^{t h} t e r m)$ and $23^{r d} t e r m$ of the sequence 3, 1, -1, -3, ......... .

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Solution

3, 1, -1, -3, ......... .
d=-2
Tn=a+(n-1)d
=3-2n+2
=5-2n

T23=5-2 $\times$ 23
=5-46
=-41

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