Question

定义在R上的奇函数f (x)以4为周期，则f (2005)+ f (2006)+ f (2007)的值为      .

Answer 1

0

解：因为奇函数f (x)有f(0)=0,因此f (2005)+ f (2006)+ f (2007)=" f" (1)+ f (2)+ f (3)=" f" (1)+ f (2)+ f (-1)=0