令t=cosx,则|t|=0时,y=t-2t=-t,其范围为[-1,0]
当t
猜你喜欢
- 1把抛物线y=x^2+bx+c向上平移3单位,移到y=x^2-2x+1求b c的值
- 2英语翻译
- 3改被动语态:I have never heard of the name.
- 4铜制品生锈,如何清除?
- 5Draw.a.green.desk的汉语意思
- 6太阳出来了,千万缕像利剑一样的金光,穿过树梢,照射在工人宿舍门前的草地上.(写一个比喻句)
- 7小学四年级如何设计班级文化建设
- 8用not...until.改写before I received a watch from my father,time never had any importance in my life.
- 9在即将离别之际,我还想祝愿我的同学{
- 10为什么氧气可以透过毛细血管和肺泡的壁进行气体交换