glennjoel glennjoel
  • 20-04-2020
  • Mathematics
contestada

What is the value of the series 1+2+3+….+na. (��(��-1))/2
b. (��(��+1))/4
c. (��(��+1))/6
d. (��(��+1))/2

all the ?/marks r N

Respuesta :

jalin154292 jalin154292
  • 20-04-2020

Answer:

i think its a

Step-by-step explanation:

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