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The nth term (tn) of a certain sequence is defined as tn = t

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The nth term (tn) of a certain sequence is defined as tn = t [#permalink] New post 04 Dec 2017, 05:24
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The \(n_{th}\) term (\(t_n\)) of a certain sequence is defined as \(t_{n}\) = \(t_{n-1}\) \(+4\). If \(t_{1}\) =−7 then \(t_{71} =\)

A. 273
B. 277
C. 281
D. 283
E. 287

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[Reveal] Spoiler: OA
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Re: The nth term (tn) of a certain sequence is defined as tn = t [#permalink] New post 04 Dec 2017, 12:54
Bunuel wrote:
The \(n_{th}\) term (\(t_n\)) of a certain sequence is defined as \(t_{n}\) = \(t_{n-1}\) \(+24\). If \(t_{1}\) =−7 then \(t_{71} =\)

A. 273
B. 277
C. 281
D. 283
E. 287

Kudos for correct solution.



Bunuel - is this the ques? as I have edited. Could you plz check the ques.
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Re: The nth term (tn) of a certain sequence is defined as tn = t [#permalink] New post 05 Dec 2017, 07:41
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I think it should be \(t_n\,=\,t_{n-1}\,+\,4\).

In that case, it's given that \(t_1 = -7\). The \(0th\) term would be \(-11\), and the sequence could be expressed as..

\(t_n = -11 + 4n\)

The 71th term is...

\(t_{71} = -11 + 4(71)\)

\(t_{71} = 273\).

The answer is A.
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Re: The nth term (tn) of a certain sequence is defined as tn = t [#permalink] New post 06 Dec 2017, 03:08
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jezzsk8 wrote:
I think it should be \(t_n\,=\,t_{n-1}\,+\,4\).

In that case, it's given that \(t_1 = -7\). The \(0th\) term would be \(-11\), and the sequence could be expressed as..

\(t_n = -11 + 4n\)

The 71th term is...

\(t_{71} = -11 + 4(71)\)

\(t_{71} = 273\).

The answer is A.



Yes right. thanks for that, i have edited the main question.
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Re: The nth term (tn) of a certain sequence is defined as tn = t [#permalink] New post 06 Dec 2017, 03:13
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Re: The nth term (tn) of a certain sequence is defined as tn = t   [#permalink] 06 Dec 2017, 03:13
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