類(lèi)似4有y=f(x)關(guān)于直線y=-x+b對(duì)稱(chēng)時(shí), f(x)=b-f(b-x).特別當(dāng)b=0時(shí).f(x)=-f關(guān)于直線y=-x對(duì)稱(chēng). 查看更多

 

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關(guān)于函數(shù),有下列命題:

(1)由f(x1)=f(x2)=0,可得,x1-x2的整數(shù)倍;

(2)y=f(x)的表達(dá)式可改寫(xiě)為y=4cos(2x-);

(3)y=f(x)的圖象關(guān)于點(diǎn)(-,0)對(duì)稱(chēng);

(4)y=f(x)的圖象關(guān)于直線x=-對(duì)稱(chēng);

其中正確命題的序號(hào)是                 

 

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.關(guān)于函數(shù)f(x)=4sin(2x+)  (x∈R),有下列命題:

(1)y=f(x )的表達(dá)式可改寫(xiě)為y=4cos (2x — );(2)y=f(x )是以2π為最小正周期的周期函數(shù);(3)y=f(x)的圖象關(guān)于點(diǎn)(— ,0)對(duì)稱(chēng);(4)y=f(x)的圖象關(guān)于直線

x= — 對(duì)稱(chēng);其中正確的命題序號(hào)是________________________.

 

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有以下四個(gè)命題:

(1)y = f ( x )和y = f 1 ( x )的圖象關(guān)于直線y = x對(duì)稱(chēng)

(2)y = f ( x )和y = f 1 ( x )的圖象關(guān)于直線y = x對(duì)稱(chēng)

(3)y = f ( x )和y = f 1 ( x )的圖象關(guān)于直線y = x對(duì)稱(chēng)

(4)y = f ( x )和y = f 1 ( x )的圖象關(guān)于直線y = x對(duì)稱(chēng)

其中,正確命題的個(gè)數(shù)是(   )

(A)1           (B)2           (C)3           (D)4

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有以下四個(gè)命題:

(1)y = f ( x )和y = f 1 ( x )的圖象關(guān)于直線y = x對(duì)稱(chēng)

(2)y = f ( x )和y = f 1 ( x )的圖象關(guān)于直線y = x對(duì)稱(chēng)

(3)y = f ( x )和y = f 1 ( x )的圖象關(guān)于直線y = x對(duì)稱(chēng)

(4)y = f ( x )和y = f 1 ( x )的圖象關(guān)于直線y = x對(duì)稱(chēng)

其中,正確命題的個(gè)數(shù)是(   )

(A)1           (B)2           (C)3           (D)4

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關(guān)于函數(shù),有下列命題:
(1)由f(x1)=f(x2)=0,可得,x1-x2的整數(shù)倍;
(2)y=f(x)的表達(dá)式可改寫(xiě)為y=4cos(2x-);
(3)y=f(x)的圖象關(guān)于點(diǎn)(-,0)對(duì)稱(chēng);
(4)y=f(x)的圖象關(guān)于直線x=-對(duì)稱(chēng);
其中正確命題的序號(hào)是                 

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