MathematicsMedium64×since 2002Q2937The coefficient of x¹⁰¹ in the expression (5+x)500+x(5+x)499+x2(5+x)498+ ..... + x500{(5 + x)^{500}} + x{(5 + x)^{499}} + {x^2}{(5 + x)^{498}} + \,\,.....\,\, + \,\,{x^{500}}(5+x)500+x(5+x)499+x2(5+x)498+.....+x500, x > 0, isA⁵⁰¹C₁₀₁ (5)³⁹⁹B⁵⁰¹C₁₀₁ (5)⁴⁰⁰C⁵⁰¹C₁₀₀ (5)⁴⁰⁰D⁵⁰⁰C₁₀₁ (5)³⁹⁹Check answerSkip