The recursive formula for an arithmetic sequence is $a_{n} = a_{n - 1} + d$ $a_n=a_(n-1)+d$ if the common difference is $- 15$ $-15$ and $a_{6} = 7$ $a_6=7$ what is the value of $a_{7}$ $a_7$ ?

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Answer 1 · 2015-10-14T01:29:18

Use the recursive formula: $a_{7} = a_{6} + d$ $a_7=a_6+d$ .

$d$ $d$ is the common difference, so $d = - 15$ $d=-15$ .

Now, substitute and do the arithmetic.

The recursive formula for an arithmetic sequence is an=an−1+da_n=a_(n-1)+d if the common difference is −15-15 and a6=7a_6=7 what is the value of a7a_7?