djdiei90 djdiei90
  • 21-10-2021
  • Mathematics
contestada

Does anyone know this answer??

Does anyone know this answer class=

Respuesta :

kyancy37 kyancy37
  • 21-10-2021
81

Use the given equation and plug in the terms.
n=20
d=4
a1=5

an = 5 +(20-1)4
=5+(19)4
=5+76
=81
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