0,9,26,65,124,( ) A.165 B.193 C.217 D.239
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![0,9,26,65,124,( ) A.165 B.193 C.217 D.239](/uploads/image/z/649852-52-2.jpg?t=0%2C9%2C26%2C65%2C124%2C%28+%29+A.165+B.193+C.217+D.239)
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0,9,26,65,124,( ) A.165 B.193 C.217 D.239
0,9,26,65,124,( ) A.165 B.193 C.217 D.239
0,9,26,65,124,( ) A.165 B.193 C.217 D.239
规律应该是n³+(-1)^n
我打不出来,应该是n的三次方加上-1的n次方.
不过答案也是C
217
0=1^3-1
9=2^3+1
26=3^3-1
65=4^3+1
124=5^3-1
217=6^3+1
1^3-1
2^3+1
3^3-1
4^3+1
5^3-1
6^3+1=217
选C
C
C,217=6^3+1
0=1^3-1,9=2^3+1,26=3^3-1,65=4^3+1,就是这样,是第几个数先就将那个数3次方,然后如果那个数是奇数就-1,偶数就+1就行了
c
0=1³-1
9=2³+1
26=3³-1
65=4³+1
124=5³-1
所以()=6³+1=217
选C