f(x)=cos2x+1/2sinx
=1-2sin2^x+1/2sinx
=-2sin2^x+1/2sinx+1
令t=sinx,t属于[-1,1]
f(x)=-2t^2+1/2t+1
-b/2a=1/8
再根据图像最终得：f(x)=[-3/2,33/32]
猜你喜欢
- 1当x
- 2托盘天平的分度盘和标尺各在哪里
- 3三重根号：大根号下 log以4为底乘根号下log以3为底乘根号下log以2为底512的对数
- 4#[58] My mother is doing some washing._______ ,my father is preparing dinner.
- 5保尔柯察金人物形象分析600字
- 6古诗出塞中秦时明月汉时关描写了怎样的景象
- 7there is a park in front of my h___.there are many trees in it.
- 8雾属于胶体还是溶液还是悬浊液,乳浊液,为什么
- 9求一些世界组织的英文缩写
- 10一个长方体最多有（）个面是正方形,最多可以有（）条棱长度相等.