Answer:
1) n=-3
2)n=10
3)n=-2
4)n=18
5)n=4
6)n=-15
7)n=14
8)n=-6
9)n=24
10)n=10
C
Step-by-step explanation:
C is the answer because a1=7 , d=-4 and so it's
an=an+(n-1)d
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