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9×0+3=3第一個是9*0得03=10*0+3 9×1+4=13第二個是9*1得13=10*1+3 9×2+5=23第三個是9*2得23=10*2+3 9×3+6=33第四個是9*3得33 =10*3+3 …… 第n個等式表示為: 9(n-1)+(n+2)=10(n-1)+3
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