不过是英文的In a sequence of 10 terms,the first term is 1,the second term is X,and each term after the second is the sum of the previous two terms.For example,if X=11,the sequence would be 1,11,12,23,35,58,93,151,244,395.For some values of X,th

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不过是英文的Inasequenceof10terms,thefirsttermis1,thesecondtermisX,andeachtermafterthesecondisthesumofthepr

不过是英文的In a sequence of 10 terms,the first term is 1,the second term is X,and each term after the second is the sum of the previous two terms.For example,if X=11,the sequence would be 1,11,12,23,35,58,93,151,244,395.For some values of X,th
不过是英文的
In a sequence of 10 terms,the first term is 1,the second term is X,and each term after the second is the sum of the previous two terms.For example,if X=11,the sequence would be 1,11,12,23,35,58,93,151,244,395.For some values of X,the number 463 appears in the sequence.If X is a positive number,what is the sum of all the values of X for which 463 appears in the sequence.
A)1156 B）1296 C)1248 D)1528 E)1283
我想知道答案是什么 还有是怎么得到那个答案的...

不过是英文的In a sequence of 10 terms,the first term is 1,the second term is X,and each term after the second is the sum of the previous two terms.For example,if X=11,the sequence would be 1,11,12,23,35,58,93,151,244,395.For some values of X,th
各数为:
1st:1
2nd:x x可以为463
3rd:x + 1 x可以为462 (462+1 = 463)
4th:2x + 1 x可以为231 (2*231+1 = 463)
5th:3x + 2 x为分数不考虑
6th:5x + 3 x = 92 (5*92+3 = 463)
7th:8x + 5 x为分数不考虑
8th:13x + 8 x = 35 (12*35+8 = 463)
9th:21x + 13 x为分数不考虑
10th:34x + 21 x = 13 (34*13 + 21 = 463)
x的和为463 + 462 + 231 + 92 + 35 + 13 = 1296

这是个数字是
1 x 1+x 1+2x 2+3x 3+5x 5+8x 8+13x 13+21x 21+34x
接下来就看463可能是第几个数了。
如果是第二个数，则x=463
如果是第三个数，则x=462
如果是第四个数，则x=231
如果是第五个数，则x=153.67，不是整数
如果是第...

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这是个数字是
1 x 1+x 1+2x 2+3x 3+5x 5+8x 8+13x 13+21x 21+34x
接下来就看463可能是第几个数了。
如果是第二个数，则x=463
如果是第三个数，则x=462
如果是第四个数，则x=231
如果是第五个数，则x=153.67，不是整数
如果是第六个数，则x=92
如果是第七个数，则x=57.25，不是整数
如果是第八个数，则x=35
如果是第九个数，则x=21.43，不是整数
如果是第十个数，则x=13
把是整数的x加起来，得到1296，选B

收起

答案：B）
数列：1，X，X+1，2X+1，3X+2，5X+3，8X+5，13X+8，21X+13，34X+21
463不能出现在第5、7、9项，出现在2、3、4、6、8、10项时，X分别为463、462、231、92、35、13，其和为1296。

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