2011ɿѧصѵ
ѵ1 ˼뼰Ӧ
ǸѧĻ֪ʶΪؿ֮һҪԼϻʶ⣬ԼΪߣ鼯Ժͼ˼áҪǰüϵĹ۵㣬ϼԼϸԡ˼Ӧá
ѵų
()֪A={(xy)|x2+mx-y+2=0}B={(xy)|x-y+1=00x2}AB ʵmȡֵΧ
ѵ2 Ҫж
ҪͳҪҪѧҪpͽq֮ĹϵҪ֪ͨͬʶֱҪ壬ÿȷжijҪϵ
ѵų
()֪xʵϵηx2+ax+b=0ʵ£֤||<2||<22|a|<4+b|b|<4ijҪ
ѵ3
ƽ½̲ĸĸӵ֮һȫʹ½̲ĵĸ߿Ӵ˶ⲿݵĿȣҪǰһЩ⡣
ѵų
()ABCУA(5-1)B(-17)C(12)(1)BCϵ
AMij;(2)CABƽADij;(3)cosABCֵ
ѵ4 Ρϵ
ΡһԪκһԪη̡һԪβʽѧѧҪݣзḻںеϵͬʱҲоڵݵĹߡ߿нһΡйءҪǰ֮ϵպ̼ʽ˼ͷ
ѵų
֪xʵֵκf(x)=x2-4ax+2a+12(aR)ֵǷǸģxķ =|a-1|+2ĸȡֵΧ
ѵ5 ⺯ʽ
⺯ʽǸ߿ص㿼֮һӡҪ⺯ĻϣʽļַγĴͽʵ
ѵų
()֪f(2-cosx)=cos2x+cosxf(x-1)
̽
[1](1)֪f(x)f(logax)= (a>0a1x>0)f(x)ıʽ
(2)֪κf(x)=ax2+bx+c|f(1)|=|f(-1)|=|f(0)|=1f(x)ıʽ
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