12-12+12-12+….. ধারাটির সাধারণ পদ (n∈N,n>1)

12-12+12-12+….. ধারাটির সাধারণ পদ (n∈N,n>1)

  1. (-1)nn+1
  2. (-1)n-1n+1
  3. (-1)n+1n+1
  4. (-1)-n-1n+1

Answer: (-1)n+1n+1

Explanation:

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