3/15+5/8+3/8+8/13= 12-(2/3-1/2)=

3/15+5/8+3/8+8/13= 12-(2/3-1/2)=
3/15+5/8+3/8+8/13= 12-(2/3-1/2)=

3/15+5/8+3/8+8/13= 12-(2/3-1/2)=
3/15+5/8+3/8+8/13
错了吧
应该是5/13+5/8+3/8+8/13
=(5/13+8/13)+(5/8+3/8)
=1+1=2
12-(2/3-1/2)
=12-1/6
=11又5/6

对，只要定义域包括x=0就有
因为f(-0)=-f(0)
f(0)=-f(0)
2f(0)=0
f(0)=0
不一定啊
比如
h(x)=x²是偶函数
f(x)=x²-x
g(x)=x
满足h(x)=f(x)+g(x)
但f(x)是非奇非偶函数，g(x)是奇函数