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**coolboyx12****Member**- Registered: 2023-03-10
- Posts: 34

it says to find the 27th and 34th term of the given sequence 31, -21, -11, -1, 9....

but i can't seem to find the common difference.

It pays to keep an open mind, but not so open your brains fall out. - Carl Sagan.

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**Jai Ganesh****Administrator**- Registered: 2005-06-28
- Posts: 45,507

Hi,

This isn't an Arithmetic Progression, nor Geometric Progression, nor Harmonic Progression. No logical series too. It appears there is a mistake in the problem.

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**Phrzby Phil****Member**- From: Richmond, VA
- Registered: 2022-03-29
- Posts: 10

If the 31 is changed to -31, then you have a good problem.

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