फलन (f(x)=x-2-10x+21) का सममिति अक्ष कौन सा है?
What is the axis of symmetry of (f(x)=x-2-10x+21)?
Explanation opens after your attempt
A. (x=5)
Concept
The axis of symmetry is \(x=-\frac{b}{2a}\). Here (a=1) and (b=-10), so (x=5).
Why this answer is correct
The correct answer is A. (x=5). The axis of symmetry is \(x=-\frac{b}{2a}\). Here (a=1) and (b=-10), so (x=5).
Exam Tip
सममिति अक्ष \(x=-\frac{b}{2a}\) होता है। यहां (a=1) और (b=-10), इसलिए (x=5)।
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