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mariarad [96]
4 years ago
13

Find an equation for the nth term of the arithmetic sequence. -20, -16, -12, -8, .

Mathematics
1 answer:
quester [9]4 years ago
8 0
A n =?
If the arithmetic sequence is:-20, - 16, - 12 , - 8 ...
a 1 = -20,  d = 4 ( a 2 = -20 + 4 = -16,  a 3 = -16+4 = -12,...)       
And the formula for nth term is:
a n = a 1 + d (n -1)
a n = -20 + 4( n -1)      (n=1.2.3...)
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