memis84 memis84
  • 25-01-2021
  • Mathematics
contestada

Please help!! I’ll mark you as brainliest if correct

Please help Ill mark you as brainliest if correct class=
Relax

Respuesta :

shekhar19 shekhar19
  • 25-01-2021

Answer:

n(n-1)/2 use this. U may check for 5

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