यदि (f(x)=x-2+2x) और (g(x)=x-2-2x) हैं तो ((f-g)(x)) क्या है?
If (f(x)=x-2+2x) and (g(x)=x-2-2x) then what is ((f-g)(x))?
Explanation opens after your attempt
A. (4x)
Concept
((f-g)(x)=x-2+2x-\(x^2-2x\)=4x). Changing signs while opening brackets is essential.
Why this answer is correct
The correct answer is A. (4x). ((f-g)(x)=x-2+2x-\(x^2-2x\)=4x). Changing signs while opening brackets is essential.
Exam Tip
((f-g)(x)=x-2+2x-\(x^2-2x\)=4x)। कोष्ठक खोलते समय चिन्ह बदलना आवश्यक है।
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