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GalinKa [24]
3 years ago
7

Find the 84th term of the arithmetic sequence −27,−12,3

Mathematics
2 answers:
jarptica [38.1K]3 years ago
6 0
Aritmetic has a common difference
-27 to -12 is a difference of 15
-12 to 3 is a difference of 15

an=a1+d(n-1)
a1=first term
d=common difference

fist term is -27
common difference is 15

an=-27+15(n-1)
84th term is n=84
a84=-27+15(84-1)
a84=-27+15(83)
a84=-27+1245
a84=1218

the 84th term is 1218
arsen [322]3 years ago
4 0
The answer will be 1218.
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