已知f(x)=1/x,g(x)=f(x-√2009)/f(x-√2008).比较g(44)与g(45)的大小.

问题描述:

已知f(x)=1/x,g(x)=f(x-√2009)/f(x-√2008).
比较g(44)与g(45)的大小.

f(x)=1/x
f(x-√2009)=1/(x-√2009)
f(x-√2008)=1/(x-√2008)
g(x)=f(x-√2009)/f(x-√2008)
=(x-√2008)/(x-√2009)
=(x-√2009-√2008+√2009)/(x-√2009)
=1+(√2009-√2008)/(x-√2009)
44^2=19360
g(44)1
因此g(44)