यदि (f(x)=x-2) और (g(x)=x+1) हों, तो ((f+g)(a)) क्या होगा?
If (f(x)=x-2) and (g(x)=x+1), what is ((f+g)(a))?
Explanation opens after your attempt
Correct Answer
A. \(a^2+a+1\)
Concept
((f+g)(x)=x-2+x+1), so putting (x=a) gives \(a^2+a+1\). The rule stays the same when the variable changes.
Why this answer is correct
The correct answer is A. \(a^2+a+1\). ((f+g)(x)=x-2+x+1), so putting (x=a) gives \(a^2+a+1\). The rule stays the same when the variable changes.
Exam Tip
((f+g)(x)=x-2+x+1), इसलिए (x=a) रखने पर \(a^2+a+1\)। चर बदलने पर नियम वही रहता है।
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