1 answer
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We can expand the expression to get:
n(n – 1) – 5 = n^2 – n – 5
To find the first four terms, we plug in n = 1, 2, 3, and 4:
- For n = 1, we get 1^2 – 1 – 5 = -5.
- For n = 2, we get 2^2 – 2 – 5 = -1.
- For n = 3, we get 3^2 – 3 – 5 = 1.
- For n = 4, we get 4^2 – 4 – 5 = 7.
Therefore, the first four terms are -5, -1, 1, 7, which is answer choice (D).