y=|sin(2x+π/4)|的周期为π/2,而y=|sin(2x+π/4)+1/2|的周期为π

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y=|sin(2x+π/4)|的周期为π/2,而y=|sin(2x+π/4)+1/2|的周期为πy=|sin(2x+π/4)|的周期为π/2,而y=|sin(2x+π/4)+1/2|的周期为πy=|s

y=|sin(2x+π/4)|的周期为π/2,而y=|sin(2x+π/4)+1/2|的周期为π
y=|sin(2x+π/4)|的周期为π/2,而y=|sin(2x+π/4)+1/2|的周期为π

y=|sin(2x+π/4)|的周期为π/2,而y=|sin(2x+π/4)+1/2|的周期为π
如果是选择或者判断,你可以画出粗略的图,看看.
如果是大题~~~
可以通过对比前后两式的绝对值作用,可知前式周期缩了一倍,后面的式子没变化~~.