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Linear algebra & Calculus& equation

GROUPS:
How can I Insert this expression in mathematicaas shown in the photo?
POSTED BY: Ahmed Al-Ali
Answer
1 year ago
f[j_] := Sum[2/(i - j), {i, Complement[Range[100], {j}]}]
POSTED BY: Frank Kampas
Answer
1 year ago
It is work very well ,, thank you very much indeed
POSTED BY: Ahmed Al-Ali
Answer
1 year ago
An alternative (Mathematica is so flexible):
f[j_] := Total[2/(Drop[Range[100], {j}] - j)]
POSTED BY: Michael Rogers
Answer
1 year ago