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將一個長方形紙片連續對折,對折的次數越多,折痕的條數也就越多,如第一次對折後,有1條折痕,第2次對折後,共有3條折痕.(1)第三次對折後共有幾條折痕?第四次呢?(2)請找出折痕條數與對折次數的對應規律,說出對折6次後…
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