- #1
kippy
- 10
- 0
i need help- arithmetic sequences
There many arithmetic sequences which seventh term equals 5. prove all of them have the same sum of their first 13 elemnets. find the sum
i found the sum was 65 but i don't know how to prove it.
There many arithmetic sequences which seventh term equals 5. prove all of them have the same sum of their first 13 elemnets. find the sum
i found the sum was 65 but i don't know how to prove it.
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