jeancool jeancool
  • 30-08-2015
  • Mathematics
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Find an equation for the nth term of the arithmetic sequence.

a19 = -58, a21 = -164

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MichaelLiu
MichaelLiu MichaelLiu
  • 30-08-2015
[tex]a_{21} = a_{19} + 2d [/tex]
[tex]-164 = -58 + 2d[/tex]
[tex]2d = -106[/tex]
[tex]d=-53[/tex]
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