jaytas jaytas
  • 24-04-2018
  • Mathematics
contestada

Find a formula for the general term a_n of the sequence assuming the pattern of the first few terms continues.

{3, 1, -1, -3, -5, ...}

Assume the first term is a1

a_n=

Respuesta :

mkryukova19 mkryukova19
  • 24-04-2018
a(1)=3
d= -2 (can be found 1-3=-2,-5-(-3)=-2)
a(n)=a(1) +d(n-1)
a(n)=3-2(n-1)
a(n)=3-2n+2=5-2n
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