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12 September, 21:50

Find an equation for the nth term of the arithmetic sequence.

-20, - 16, - 12, - 8,.

+1
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  1. 12 September, 22:04
    0
    We are given with the sequence - 20, - 16, - 12, - 8. From this sequence, we can see that the arithmetic difference is + 4, from - (-20 + 16). hence following the arithmetic formula of an = a1 + d * (n-1). Substituting, an = - 20 + 4 * (n-1) where n is an integer
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