Multiple choice

What is the nth term of the given sequence? - 3, - 1, 1, 3, ...

    • n + 1
    • n - 1

  3. 2n + 1

  4. 2n - 5
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D Correct answer
Explanation

The sequence is an arithmetic progression with a first term of -3 and a common difference of 2. The formula for the n-th term is a + (n-1)d, which simplifies to -3 + (n-1)2 = -3 + 2n - 2 = 2n - 5.

AI explanation

This sequence follows an arithmetic progression with the first term of -3 and a common difference of 2. The general formula for the nth term of an arithmetic progression is Tn = a + (n - 1)d. Substituting the values gives Tn = -3 + (n - 1)2, which simplifies to 2n - 5.

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