Multiple choice

What would be the 9th term of the given sequence? 11, 21, 31, 41, ...

  1. 81

  2. 89

  3. 91

  4. 94
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C Correct answer
Explanation

The sequence is an arithmetic progression with a = 11 and d = 10. The nth term is a + (n-1)d. The 9th term is 11 + (9-1)10 = 11 + 80 = 91.

AI explanation

This sequence is an arithmetic progression with a common difference of 10. The nth term of an arithmetic progression is calculated using the formula a + (n-1)d. Applying this, the 9th term is 11 + (9-1)10, which equals 11 + 80, giving the result 91.

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