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1、专业好文档均值不等式专题讲义题型一、利用基本不等式求值域1、已知,求函数的最大值。2、设,求函数的最大值3、求的值域。4、求函数的值域。5、设x,y的最小值为___题型二、条件最值1、若实数满足,则的最小值是2、已知,且,求的最小值。3、已知,且,则的最小值为4、若x,y∈(0,+∞)且2x+8y-xy=0,求x+y的最小值.5、已知正数满足,则的最小值为6、已知a,b为正实数,且的最小值为(7、若正数x,y满足x+3y=5xy,则3x+4y的最小值是()题型三、变式条件最值1、设为实数,若则的最大值是2、若实数满足,则
2、的最大值是3、,则的最小值专业好文档4、设正实数x,y,z满足x2-3xy+4y2-z=0.则当取得最大值时,的最大值为5、设正实数满足,则当取得最大值时,的最大值为()6、设a+b=2,b>0,则当a=时,取得最小值.题型四、综合型1、若直线平分圆,则的最小值是()2、函数>,且的图象恒过定点A,若点A在直线上(其中m,n>0),则的最小值等于3、已知都是正实数,函数的图象过(0,1)点,则的最小值是4、设x,y满足约束条件,w.w.w.k.s.5.u.c.o.m若目标函数z=ax+by(a>0,b>0)的值是最大值为
3、12,则的最小值为().5、若a>0,b>0,且函数f(x)=4x3-ax2-2bx+2在x=1处有极值,则ab的最大值等于()6、已知a,b为正实数,2b+ab+a=30,求函数y=的最小值.题型五、其他情况1、设常数a>0.若对一切正实数x成立,则a的取值范围为2、已知且,求使不等式恒成立的实数的取值范围。3、若,则的大小关系是4、已知x,y为正实数,且x2+=1,求x的最大值.专业好文档WingerTuivasa-Sheck,whoscoredtwotriesintheKiwis'20-18semi-finalwi
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