((1+x)9) में \(x^4\) और \(x^5\) के coefficients क्यों बराबर हैं?
Why are the coefficients of \(x^4\) and \(x^5\) in ((1+x)9) equal?
Explanation opens after your attempt
A. क्योंकि (4+5=9)Because (4+5=9)
Concept
The coefficients are \(^{9}C_4\) and \(^{9}C_5\), which have complementary indices. In exams check symmetry in binomial coefficients.
Why this answer is correct
The correct answer is A. क्योंकि (4+5=9) / Because (4+5=9). The coefficients are \(^{9}C_4\) and \(^{9}C_5\), which have complementary indices. In exams check symmetry in binomial coefficients.
Exam Tip
Coefficient क्रमशः \(^{9}C_4\) और \(^{9}C_5\) हैं और ये पूरक indices हैं। परीक्षा में binomial coefficients में symmetry देखें।
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