Find a8 and a15 whose nth term is an = {n2-1n+3;n is even, n ∈ Nn22n+1;n is odd, n ∈ N - Mathematics

Find a₈ and a₁₅ whose n^th term is a_n= `{{:(("n"^2 - 1)/("n" + 3)";", "n is even""," "n ∈ N"),(("n"^2)/(2"n" + 1)";", "n is odd""," "n ∈ N"):}`

Sum

a_n= `{{:(("n"^2 - 1)/("n" + 3)";", "n is even"),(("n"^2)/(2"n" + 1)";", "n is odd"):}`

a₈= `("n"^2 - 1)/("n" + 3) = (8^2 - 1)/(8 + 3) = (64 - 1)/11 = 63/11`

a₁₅= `"n"^2/(2"n" + 1) = 15^2/(2 xx 15 + 1) = 225/(30 + 1) = 225/31`

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Chapter 2: Numbers and Sequences - Exercise 2.4 [Page 55]

Chapter 2 Numbers and Sequences
Exercise 2.4 | Q 5 | Page 55

Find the next three terms of the following sequence.

8, 24, 72, …

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Find the first four terms of the sequence whose n^th terms are given by a_n = (–1)ⁿ⁺¹ n(n + 1)

Find the first four terms of the sequences whose n^th terms are given by a_n = 2n² – 6

Find the n^th term of the following sequence

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