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

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Answer 1 · 2015-10-14T01:29:18

Use the recursive formula: $a_7=a_6+d$ .

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

Now, substitute and do the arithmetic.

The recursive formula for an arithmetic sequence is a_n=a_(n-1)+da_n=a_(n-1)+d if the common difference is -15-15 and a_6=7a_6=7 what is the value of a_7a_7?