(\(1+x+x^2\)^n) में \(x^2\) के coefficient को किस count से derive करेंगे?
How will the coefficient of \(x^2\) in (\(1+x+x^2\)^n) be derived?
Explanation opens after your attempt
A. एक bracket से \(x^2\) या दो brackets से (x) चुननाChoose \(x^2\) from one bracket or (x) from two brackets
Concept
There are two disjoint cases to form \(x^2\). In exams make exponent-sum cases for polynomial expansion coefficients.
Why this answer is correct
The correct answer is A. एक bracket से \(x^2\) या दो brackets से (x) चुनना / Choose \(x^2\) from one bracket or (x) from two brackets. There are two disjoint cases to form \(x^2\). In exams make exponent-sum cases for polynomial expansion coefficients.
Exam Tip
\(x^2\) बनने के दो disjoint cases हैं। परीक्षा में polynomial expansion coefficients में exponent-sum cases बनाएं।
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