f(x) 是偶函数,则有f(x) = f(-x)
f(x) = f(-x) = f(-(x+1) + 1)
f(x+1)为奇函数,则有
f(-(x+1) + 1) = -f(x+1 + 1) = f(x + 2)
也就是
f(x) = f(x+2)
所以其正周期为 2
f(x) 是偶函数,则有f(x) = f(-x)
f(x) = f(-x) = f(-(x+1) + 1)
f(x+1)为奇函数,则有
f(-(x+1) + 1) = -f(x+1 + 1) = f(x + 2)
也就是
f(x) = f(x+2)
所以其正周期为 2