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AnaSantossz
@AnaSantossz
December 2019
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Quantos termos possui uma P.A. em que r= -11 , a1= 1 e o termo An= -186?
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gabrielscoosta
an = a1 + (n-1)r
-186 = 1 + (n-1)-11
-186 = 1 + -11n + 11
-186 - 12 = -11n
-198 = -11n
n = 18
3 votes
Thanks 6
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-186 = 1 + (n-1)-11
-186 = 1 + -11n + 11
-186 - 12 = -11n
-198 = -11n
n = 18