यदि (f(x)=x-2-4x), तो (f(x+1)-f(x)) क्या होगा?
If (f(x)=x-2-4x), what is (f(x+1)-f(x))?
Explanation opens after your attempt
A. (2x-3)
Concept
Write (f(x+1)=(x+1)2-4(x+1)).
Why this answer is correct
Simplifying gives \(x^2-2x-3\).
Exam Tip
Now (x-2-2x-3-\(x^2-4x\)=2x-3). चरण 1: (f(x+1)=(x+1)2-4(x+1)) लिखें। चरण 2: सरल करने पर \(x^2-2x-3\) मिलता है। चरण 3: अब (x-2-2x-3-\(x^2-4x\)=2x-3) होगा।
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