Answer:
7th term = (-1)
rule for the nth term = an = a+(n-1)d
Explanation:
a = 5, d = a2-a1 = 4-5 = -1, n = 7
an = a+(n-1)d
a7 = 5+(7-1)(-1)
a7 = 5-6
a7 = (-1)
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