marisleydibarrp515c7
marisleydibarrp515c7 marisleydibarrp515c7
  • 17-09-2018
  • Mathematics
contestada

need help and show me the steps

need help and show me the steps class=

Respuesta :

sunnyk2297
sunnyk2297 sunnyk2297
  • 17-09-2018

S= n/2 (a+1)

Divide both sides by n/2

S/n/2= a+l

Subtract 1from both sides

S/n/2-1=a

Answer Link

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