9．The symbol 5! Is called five factorialand means 5×4×3×2×1,Thus5! =120.How many 6!=? What is the re——青夏教育精英家教网——

摘要：9．The symbol 5! Is called five factorialand means 5×4×3×2×1,Thus5! =120.How many 6!=? What is the result of ? Do you know ? 6!= =

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The symbol（符号） 5！is called five factorial（阶乘）and means 5×4×3×2×1；Thus（因而）5！=120．How many 6！=？What is the result of

？Do you know 6！=

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The symbol（符号） 5！is called five factorial（阶乘）and means 5×4×3×2×1；Thus（因而）5！=120．How many 6！=？What is the result of

？Do you know 6！=______；

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If the equation m（x-1）=2001-n（x-2）for x has infinite roots，then m²⁰⁰¹+n²⁰⁰¹=

．（英汉小字典：equation方程；infinite roots无数个根）查看习题详情和答案>>

Given a，b，c satisfy c＜b＜a and ac＜0，then which one is not sure to be correct in the following inequalities？（　　）
（英汉词典：besureto确定；correct正确的；inequality不等式）

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If n is a positive integer，and if the units’digit of n²is 6 and the units’digit of （n-1）²is 9，the units’digit of （n+1）²is

．（英汉小词典 units’digit：个位数字）

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