Trục đối Xứng Của Parabol Là đường Thẳng Có Phương Trình

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Câu hỏi

Trục đối xứng của parabol img1 là đường thẳng có phương trình

A.

A : img1

B.

B : img1

C.

C : img1

D.

D : img1

Đáp án và lời giải Đáp án:D Lời giải:

Phân tích: Trục đối xứng của parabol img1 là đường thẳng img2. Trục đối xứng của parabol img3 là đường thẳng img4.  

 

Đáp án đúng là  D

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