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hushjelpw4

hushjelpw4

Answered question

2022-05-20

n = 1 arctan 2 n 2 + n + 4

Answer & Explanation

glorietka4b

glorietka4b

Beginner2022-05-21Added 14 answers

Hint:
2 n 2 + n + 4 = 1 2 1 + n ( n + 1 ) 4 = n + 1 2 n 2 1 + n 2 n + 1 2
For the second,
8 n n 4 2 n 2 + 5 = ( n + 1 ) 2 2 ( n 1 ) 2 2 ( n + 1 ) 2 2 ( n 1 ) 2 2 + 1

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