f(x)是奇函数,f(-x)=-f(x)
[0,1]时,f(x)=-x²
[-1,0]时,f(-x)=-f(x)=-(-x²)=x²
当 x=0,f(0)=0²=0
f(3)+f(-2/3)
=f(1+2)+f(-2/3)
=f(1-2)+f(-2/3)
=f(-1)+f(-2/3)
=(-1)²+(-2/3)²
=1+4/9
=13/9
f(x)是奇函数,f(-x)=-f(x)
[0,1]时,f(x)=-x²
[-1,0]时,f(-x)=-f(x)=-(-x²)=x²
当 x=0,f(0)=0²=0
f(3)+f(-2/3)
=f(1+2)+f(-2/3)
=f(1-2)+f(-2/3)
=f(-1)+f(-2/3)
=(-1)²+(-2/3)²
=1+4/9
=13/9