1×2×3×4×5×······×50,其结果后面有几个0?
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1×2×3×4×5×······×50,其结果后面有几个0?1×2×3×4×5×······×50,其结果后面有几个0?1×2×3×4×5×······×50,其结果后面有几个0?应该有10个0,2*
1×2×3×4×5×······×50,其结果后面有几个0?
1×2×3×4×5×······×50,其结果后面有几个0?
1×2×3×4×5×······×50,其结果后面有几个0?
应该有10个0,2*5,12*15,22*25,32*35,42*45,10,20,30,40,50
1 2 3 4 ·····7 ·······10 ········?1 3 5 7 ·····?······?··········290 1 4 9 ·····?······?··········?
1+2+3+4+5····+50
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