परवलय (y=(x+2)2-7) की सममिति अक्ष कौन सी है?
What is the axis of symmetry of the parabola (y=(x+2)2-7)?
Explanation opens after your attempt
A. (x=-2)
Concept
In (y=(x-h)2+k) the axis of symmetry is (x=h). Here (h=-2).
Why this answer is correct
The correct answer is A. (x=-2). In (y=(x-h)2+k) the axis of symmetry is (x=h). Here (h=-2).
Exam Tip
(y=(x-h)2+k) में सममिति अक्ष (x=h) होती है। यहां (h=-2) है।
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