xianat707
xianat707 xianat707
  • 19-10-2021
  • Mathematics
contestada

Can someone help me with number 8 :(

Can someone help me with number 8 class=

Respuesta :

Hamed313
Hamed313 Hamed313
  • 19-10-2021

Answer:

a1=5

d=9-5=4

a20=5+19×4=81

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