The common difference in this sequence, d = a2 -a1= -25 --10= -15
To find the nth term, an= a1+ (n-1)d
Therefore, a81 = -10 + (81-1)(-15) = -1210
Alexa H.
asked • 03/27/17Find the 81st term of the arithmetic sequence -10,-25,-40
Find the 81st term of the arithmetic sequence -10,-25,-40
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