(4) 對(duì)于軸上的點(diǎn).滿足.則稱點(diǎn)為點(diǎn)對(duì)應(yīng)的“比例點(diǎn) .求證: 查看更多

 

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已知點(diǎn)A(-5,0),B(5,0),動(dòng)點(diǎn)P滿足8成等差數(shù)列

(1)求點(diǎn)P的軌跡方程;

(2)對(duì)于x軸上的點(diǎn)M,若滿足,則稱點(diǎn)M為點(diǎn)P對(duì)應(yīng)的“比例點(diǎn)”,求證:對(duì)任意一個(gè)確定的點(diǎn)P,它總對(duì)應(yīng)兩個(gè)“比例點(diǎn)”.

(3)當(dāng)點(diǎn)P在(1)的軌跡上運(yùn)動(dòng)時(shí),求它在(2)中對(duì)應(yīng)的“比例點(diǎn)”M的橫坐標(biāo)的取值范圍.

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已知A(-5,0),B(5,0),動(dòng)點(diǎn)P滿足|
PB
|,
1
2
|
PA
|,8成等差數(shù)列.
(1)求P點(diǎn)的軌跡方程;
(2)對(duì)于x軸上的點(diǎn)M,若滿足|
PA
|•|
PB
|=
PM
2
,則稱點(diǎn)M為點(diǎn)P對(duì)應(yīng)的“比例點(diǎn)”.問(wèn):對(duì)任意一個(gè)確定的點(diǎn)P,它總能對(duì)應(yīng)幾個(gè)“比例點(diǎn)”?

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設(shè)函數(shù)y=f(x)滿足對(duì)任意的實(shí)數(shù)t,都有f(1+t)=-f(1-t),f(t-2)=f(2-t)成立,則下面關(guān)于函數(shù)y=f(x)的說(shuō)法:①圖象關(guān)于點(diǎn)(1,0)對(duì)稱;②圖象關(guān)于y軸對(duì)稱;③以2為周期;④f(2009)=0.其中正確的有
①②④
①②④
(將你認(rèn)為正確說(shuō)法前面的序號(hào)都填上).

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已知A(-5,0),B(5,0),動(dòng)點(diǎn)P滿足||,|,8成等差數(shù)列.

(1)求P點(diǎn)的軌跡方程;

(2)對(duì)于x軸上的點(diǎn)M,若滿足||·||=,則稱點(diǎn)M為點(diǎn)P對(duì)應(yīng)的“比例點(diǎn)”.問(wèn):對(duì)任意一個(gè)確定的點(diǎn)P,它總能對(duì)應(yīng)幾個(gè)“比例點(diǎn)”?

 

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已知A(-5,0),B(5,0),動(dòng)點(diǎn)P滿足||,|,8成等差數(shù)列.
(1)求P點(diǎn)的軌跡方程;
(2)對(duì)于x軸上的點(diǎn)M,若滿足||·||=,則稱點(diǎn)M為點(diǎn)P對(duì)應(yīng)的“比例點(diǎn)”.問(wèn):對(duì)任意一個(gè)確定的點(diǎn)P,它總能對(duì)應(yīng)幾個(gè)“比例點(diǎn)”?

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