问题标题:
若函数f(x)=(x-1)(x-2)(x-3)...(x-2011),f'(2011)=?f'(2011)=2010怎么求得的.
问题描述:
若函数f(x)=(x-1)(x-2)(x-3)...(x-2011),f'(2011)=?
f'(2011)=2010怎么求得的.
常俊林回答:
f(x)=g(x)(x-2011),g(x)=(x-1)..(x-2010)
f'(x)=g'(x)(x-2011)+g(x)
f'(2011)=g(2011)=2010*2009**..1=2010!
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