1×2×3×4×...×2009×2010 Hint: Consider the product of the first 5 integers.
问题描述:
1×2×3×4×...×2009×2010 Hint: Consider the product of the first 5 integers.
答
1×2×3×4×...×2009×2010 Hint: Consider the product of the first 5 integers.