consider the sequence -3,9,-27
write down the general term,hence the 100th term
maths 問題 about general term
2009-07-11 6:49 am
回答 (1)
2009-07-11 7:00 am
✔ 最佳答案
a1 = -3a2 = -3*(-3) = 9
a3 = 9 * (-3) = -27
So an = -3 * (-3)n-1 = (-3)n
a100 = (-3)100 = 3100 = 5.154 x 1047
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