AQA Core 2 5.12a Using Sigma Notation for Arithmetic Series

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Комментарии
Автор

For the second question, if you minus the sum of second term by the sum of the tenth term, you get a different answer. Am i doing it wrong???

m_l
Автор

Hmm, I worked out the the 3rd terms to 10th individually and I managed to get 284 but not 204... I've tried this method of getting n by subtracting the bottom by top and adding 1, and got wrong answers with it.

Shah