三角函数 f(x) = (sin x)^6 + (cos x)^6 + k((sin x)^4 + (cos x)^4)1.k为什么数时f ' (x)=0?2.k=-7/10时,f(a)=0,找出所有这样的a,0到90度之间.3.找出所有的k,使f(x)=0有解
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/04 22:55:27
![三角函数 f(x) = (sin x)^6 + (cos x)^6 + k((sin x)^4 + (cos x)^4)1.k为什么数时f ' (x)=0?2.k=-7/10时,f(a)=0,找出所有这样的a,0到90度之间.3.找出所有的k,使f(x)=0有解](/uploads/image/z/4332931-43-1.jpg?t=%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0+f%28x%29+%3D+%28sin+x%29%5E6+%2B+%28cos+x%29%5E6+%2B+k%28%28sin+x%29%5E4+%2B+%28cos+x%29%5E4%291.k%E4%B8%BA%E4%BB%80%E4%B9%88%E6%95%B0%E6%97%B6f+%27+%28x%29%3D0%3F2.k%3D-7%2F10%E6%97%B6%2Cf%28a%29%3D0%2C%E6%89%BE%E5%87%BA%E6%89%80%E6%9C%89%E8%BF%99%E6%A0%B7%E7%9A%84a%2C0%E5%88%B090%E5%BA%A6%E4%B9%8B%E9%97%B4.3.%E6%89%BE%E5%87%BA%E6%89%80%E6%9C%89%E7%9A%84k%2C%E4%BD%BFf%28x%29%3D0%E6%9C%89%E8%A7%A3)
xSn@:#{q ) YBJD2HEH RC5MP??Dc;3vM$s=suL/[e/'F=5ozWCT2^[EdË2@;wi-6q@ u [d {G#U$ute$PB
"@l/8ؒ!۾