Meli0ssWorLatoltora Meli0ssWorLatoltora

14-06-2016
Mathematics

Answered

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

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

Verified Answer :

HomertheGenius HomertheGenius

20-06-2016

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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