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(1)3=1+2為1的平方加2;6=4+2為2的平方加2;27為5的平方加2 .(2)現在就要分析1,2,5是什麼規律,後面應該是多少?1為0的平方加1,2為1的平方加1,5為2的平方加1,所以下一個數應該為3的平方加1,為10.固1,2,5後面的…
42°22′-18°36′ =41°82′-18°36′ =23°46′
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