Question

Find the S 23 if the sum of AP of nth term is 4n-n².
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Answer 1

Step-by-step explanation:

$\tt{S_{n}=4n-n^2}$

$\tt{S_{23}=4 \times 23-(23)^2}$

$\tt{S_{23}=92-529}$

$\tt{S_{23}= - 437}$

Answer.

Step-by-step explanation:

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