William W. answered • 02/20/23
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Math and science made easy - learn from a retired engineer
If you sketch it out, this is a simple problem.
The general form of an arithmetic sequence is an = a1 + d(n - 1) so to complete it, you need to insert "a1" and "d".
Because an arithmetic sequence is formed by adding a number "d" to each term, if you add "d" twice to 46 you will get 49. So:
46 + 2d = 49
2d = 3
d = 1.5
Now, just subtract 1.5 twice to get to a1:
46 - 2d = a1
46 - 2(1.5) = a1
43 = a1
So the equation for the general term an is:
an = 43 + 1.5(n - 1)
William W.
Computer programs are funny. Perhaps you need to enter 1.5 as a fraction (3/2) or some crazy thing. You could also multiply the equation out and try that. It would mean a(n) = 1.5n + 41.5
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02/21/23
Gyo O.
Thank you. This is what i got but the computer tells me this is incorrect. Is there any final answer than this?02/20/23