[計量] The first term of a sequence is ...
The first term of a sequence is 1, and each of the
following terms is 1 less than 3 times the preceding
term.
Column A Column B
The smallest number 120
that is greater than 100
in the sequence.
Ans: A
請問這題的數列是什麼形式？
是不是像我的想這樣子：
1 = 1
1 - 3*(1) = -2
1 - 3*(-2) = 7
1 - 3*(7) = -20
1 - 3*(-20) = 61
1 - 3*(61) = -182
1 - 3*(-182) = 547
547是數列裡大於100的最小值，所以選A。
麻煩大家解答了，謝謝。
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