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Maths TNSB Mentoring
Class 10
Numbers and sequences
Revision I
4.
TBQ - Find the first four terms
Question:
2
m.
Evaluate
the first four terms of the sequences whose \(n^{\text{th}}\) terms are given by
\(a_n = (-1)^{n + 1} n (n + 1)\)
\(-2\), \(8\), \(-12\) and \(20\)
\(2\), \(-6\), \(12\) and \(-20\)
\(-2\), \(-10\), \(28\) and \(-42\)
\(2\), \(-8\), \(16\) and \(-32\)
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