高中难题向量卷子7.已知f(x)是定义在R上的偶函数,当x>0时,[xf'(x)-f(x)]/x^2>0,且f(-2)=0,则不等式f(x)/x>0的解集是多少?8.已知i为虚数单位,则复数i(3-4i)的实部和虚部分别是多少?9.若f(x)=(k-2)x^2+(k-1)x+3是
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/16 22:29:15
![高中难题向量卷子7.已知f(x)是定义在R上的偶函数,当x>0时,[xf'(x)-f(x)]/x^2>0,且f(-2)=0,则不等式f(x)/x>0的解集是多少?8.已知i为虚数单位,则复数i(3-4i)的实部和虚部分别是多少?9.若f(x)=(k-2)x^2+(k-1)x+3是](/uploads/image/z/13710386-2-6.jpg?t=%E9%AB%98%E4%B8%AD%E9%9A%BE%E9%A2%98%E5%90%91%E9%87%8F%E5%8D%B7%E5%AD%907.%E5%B7%B2%E7%9F%A5f%28x%29%E6%98%AF%E5%AE%9A%E4%B9%89%E5%9C%A8R%E4%B8%8A%E7%9A%84%E5%81%B6%E5%87%BD%E6%95%B0%2C%E5%BD%93x%3E0%E6%97%B6%2C%5Bxf%27%28x%29-f%28x%29%5D%2Fx%5E2%3E0%2C%E4%B8%94f%28-2%29%3D0%2C%E5%88%99%E4%B8%8D%E7%AD%89%E5%BC%8Ff%28x%29%2Fx%3E0%E7%9A%84%E8%A7%A3%E9%9B%86%E6%98%AF%E5%A4%9A%E5%B0%91%3F8.%E5%B7%B2%E7%9F%A5i%E4%B8%BA%E8%99%9A%E6%95%B0%E5%8D%95%E4%BD%8D%2C%E5%88%99%E5%A4%8D%E6%95%B0i%283-4i%29%E7%9A%84%E5%AE%9E%E9%83%A8%E5%92%8C%E8%99%9A%E9%83%A8%E5%88%86%E5%88%AB%E6%98%AF%E5%A4%9A%E5%B0%91%3F9.%E8%8B%A5f%28x%29%3D%28k-2%29x%5E2%2B%28k-1%29x%2B3%E6%98%AF)
xUNH~K+=h3wԫHJHQ.Zn| K-iҖİmTM@-P'8
WyPج*uՋ|qf;o2]wӋ^IYTGҬL/D+ԏIewsR'2龰Z}.笅)@+e^(ɾ *(5
߭eU)D7`
^G;k4āCN4.n'l8T6n
)Ek/Z}Kߍ' ,> # =eI2_,~߰or7Ɗsjw/tm7$,#zda얃=zmS.|=#vV^*>?*JI?-lP\N5$nhCşS*4-M i^29^wV=W>+!Y槲Zt:QՂdҕ7ʐ7$Upr6@\lEN̚}XD]apj%{@"N(4m|@wl2t/`$Jx;Xj p
{crq-RجbR!Ӓ
nc?%0.`N Ԇ$=LJ%sL1vj VvD!InAU#ohH3
5KL̗zru
:gԹAE(?r5v WCZ˻}ȡ$yB4M b THo{ͨKldw;u@uwv@`X3֩y:7*qh8ȩˠvxD4/