Answer:
for the 81st term of this arithmetic sequence is going to be -508
Step-by-step explanation:
From the first three term(a1, a2, a3) we can see the common difference is going to be -6, and we know the first term of the arithmetic sequence is -28,
and the general expression of a arithmetic sequence is going to be an=a1+d(n-1)
in this case is going to be an=-6n-22, replacing 81 we got a a81 is going to be -508
