jessicagarcia85
jessicagarcia85 jessicagarcia85
  • 12-08-2018
  • Mathematics
contestada

find the explicit formula for the arithmetic sequence -31,-27,-23,-19 b(n)= ?

find the explicit formula for the arithmetic sequence 31272319 bn class=
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rsten rsten
  • 12-08-2018

b(n)=-31+4(n-1) is the explicit formula

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konrad509
konrad509 konrad509
  • 12-08-2018

[tex] a_n=a_1+(n-1)d\\
a_1=-31\\
d=a_n-a_{n-1}=-27-(-31)=-27+31=4\\
a_n=-31+(n-1)\cdot 4\\a_n=-31+4n-4\\
a_n=4n-35
[/tex]

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