(Ⅱ)證明:當(dāng)x∈(-.-)時(shí).經(jīng)過(guò)函數(shù)y=f(x)的圖像上任意兩點(diǎn)的直線斜率為負(fù)數(shù). 查看更多

 

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設(shè)函數(shù)y=f(x)對(duì)任意實(shí)數(shù)x,都有f(x)=2f(x+1),當(dāng)x∈[0,1]時(shí),f(x)=x2(1-x).

(1)已知n∈N+,當(dāng)x∈[n,n+1]時(shí),求y=f(x)的解析式;

(2)求證:對(duì)于任意的n∈N+,當(dāng)x∈[n,n+1]時(shí),都有|f(x)|≤;

(3)對(duì)于函數(shù)y=f(x)(x∈[0,+∞),若在它的圖象上存在點(diǎn)P,使經(jīng)過(guò)點(diǎn)P的切線與直線x+y=1平行,那么這樣點(diǎn)有多少個(gè)?并說(shuō)明理由.

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設(shè)函數(shù)y=f(x)對(duì)任意實(shí)數(shù)x,都有f(x)=2f(x+1),當(dāng)x∈[0,1]時(shí),f(x)=x2(1-x).

(Ⅰ)已知n∈N+,當(dāng)x∈[n,n+1]時(shí),求y=f(x)的解析式;

(Ⅱ)求證:對(duì)于任意的n∈N+,當(dāng)x∈[n,n+1]時(shí),都有|f(x)|≤;

(Ⅲ)對(duì)于函數(shù)y=f(x)(x∈[0,+∞),若在它的圖象上存在點(diǎn)P,使經(jīng)過(guò)點(diǎn)P的切線與直線x+y=1平行,那么這樣點(diǎn)有多少個(gè)?并說(shuō)明理由.

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已知函數(shù)的圖象經(jīng)過(guò)A(0,1),且在該點(diǎn)處的切線與直線2x+y+1=0平行.

(1)求b與c的值;

(2)求f(x)在[1,3]上的最大值與最小值分別為M(a),N(a),求F(a)=M(a)-N(a)的表達(dá)式.

(3)在)(2)的條件下,當(dāng)a在區(qū)間上變化時(shí),證明:3a2+2>F(a)

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