यदि (f(x)=x-2+4x) और (g(x)=3x-5) हों, तो ((f-g)(x)) ज्ञात कीजिए।
If (f(x)=x-2+4x) and (g(x)=3x-5), find ((f-g)(x)).
Explanation opens after your attempt
A. \(x^2+x+5\)
Concept
((f-g)(x)=f(x)-g(x)), hence (x-2+4x-(3x-5)=x-2+x+5). While subtracting, change the signs inside the bracket.
Why this answer is correct
The correct answer is A. \(x^2+x+5\). ((f-g)(x)=f(x)-g(x)), hence (x-2+4x-(3x-5)=x-2+x+5). While subtracting, change the signs inside the bracket.
Exam Tip
((f-g)(x)=f(x)-g(x)), अतः (x-2+4x-(3x-5)=x-2+x+5)। घटाते समय bracket का sign बदलता है।
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