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

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

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