Question 1039880: Which term of the arithmetic sequence is -18 , given a1=7 and a2=2? Found 2 solutions by Aldorozos, ikleyn:Answer by Aldorozos(172) (Show Source):
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Your first term is 7
The second term is
2=7+(2-1)r
r=-5
-18= 7+ (n-1)(-5)
N=6