当-2≤x≤0时,
0≤x+2≤2
f(x+2)=2^(x+2)-(x+2)
而T=2
f(x)=f(x+2)=2^(x+2)-(x+2)
当2≤x≤4时,
0≤x-2≤2
f(x-2)=2^(x-2)-(x-2)
T=2
f(x)=f(x-2)=2^(x-2)-(x-2)
所以,
` {2^(x+2)-(x+2) (-2≤x
当-2≤x≤0时,
0≤x+2≤2
f(x+2)=2^(x+2)-(x+2)
而T=2
f(x)=f(x+2)=2^(x+2)-(x+2)
当2≤x≤4时,
0≤x-2≤2
f(x-2)=2^(x-2)-(x-2)
T=2
f(x)=f(x-2)=2^(x-2)-(x-2)
所以,
` {2^(x+2)-(x+2) (-2≤x