Which of the following correctly uses the explicit formula, An=14+(n−1)⋅12

, to find the 9th term of the described arithmetic sequence?(1 point)
Responses

414
4 Start Fraction 1 over 4 End Fraction

834
8 Start Fraction 3 over 4 End Fraction

814
8 Start Fraction 1 over 4 End Fraction

434

1 answer

To find the 9th term of the arithmetic sequence given by the explicit formula \( A_n = 14 + (n - 1) \cdot 12 \), we can substitute \( n = 9 \) into the formula.

Here’s how to calculate it:

\[ A_9 = 14 + (9 - 1) \cdot 12 \] \[ A_9 = 14 + 8 \cdot 12 \] \[ A_9 = 14 + 96 \] \[ A_9 = 110 \]

None of the responses (414, 834, 814, 434) match the calculated value of \( 110 \). It appears there may be an error with the provided options, or the formula itself might need to be re-evaluated.