1.Write the nth term of the sequence: 2,-4,6,-8,10,... 2.Write the 10th term of the sequence:0.1,0.01,0.001,.



Answers:
1. 2, -4, 6, -8, 10, -12, 14, -16, 18.
18 is the 9th term.

2. 0.1, 0.01, 0.001, 0.0001, 0.00001, 0.000001, 0.0000001, 0.00000001, 0.000000001, 0.0000000001
the 10th term is 0.0000000001
2n(-1)^(n+1)

.0000000001

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