Question

⭐Find the 7th term of the sequence whose nth term is given by $a_{n} =(-1)^{n-1} .n^{3 }$⭐

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Answer 1

Given nth term of the sequence(an) = (-1)^n-1.n³
Put n =7
Therefore, 7th term of the sequence(a7) = (-1)^7-1. 7³
=1^6.343
= 1. 343
=343

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