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21-06-2016
Mathematics

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What is the 25th term in the following arithmetic sequence?
-7, -2, 3, 8, ...

Respuesta :

21-06-2016

[tex]a_n = a_1 + (n-1)d [/tex]
[tex]a_1= First~number [/tex]
[tex]d=Common~difference[/tex]
[tex]n=Number~of~terms[/tex]
---------------------------------------
[tex]a_{25}= -7 + (25-1)(8-3)[/tex]
[tex]a_{25}= 113[/tex]

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