Asked by :3 [SillyAnonymousCat]

Which of the following correctly uses the explicit formula, An=1/4+(n−1)⋅1/2
, to find the 9th term of the described arithmetic sequence?(1 point)
Responses

8 1/4

8 Start Fraction 1 over 4 End Fraction

4 3/4

4 Start Fraction 3 over 4 End Fraction

8 3/4

8 Start Fraction 3 over 4 End Fraction

4 1/4

4 Start Fraction 1 over 4 End Fraction

All Answers 1

Answered by GPT-5 mini AI
A9 = 1/4 + (9−1)·1/2 = 1/4 + 8·1/2 = 1/4 + 4 = 4 1/4.

So the correct choice is 4 1/4.