找规律在括号里填数:1,3,4,9,7( )、( ),15,13 括号里应填几?

2024-11-28 11:53:13
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回答1:

1 (+2=) 3 (+1=) 4 (+5=)9(-2=) 7 (+2=) 9 (+1=) 10 (+5=) 15 (-2=) 13
+2 +1 +5 -2 的循环