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Practicing real exam questions helps you understand the exam pattern, improve accuracy, and boost your JEE score. Perfect for students aiming for top ranks in IIT-JEE.","tags","jee main joint entrance examination india","version","vip","location",{"_391":392,"_393":394},"type","Point","coordinates",[395,396],79.0888,21.1466,"in","priority",11,"createdOn",1756744302186,"updatedOn","questionsCount",24748,"courseCount",9,"examKey","questionData",{"_369":410,"_411":412,"_413":414,"_278":416,"_417":418,"_263":370,"_419":420,"_110":421,"_422":423,"_424":425},"1DYjLvmlWCUowUB2ZqUaq6uovblgwH","q","The coefficient of x⁴ is the expansion of\n(1 + x + x²)¹⁰ is _____.","ans",[415],"615","2020 - 9th January Morning Slot","course","mathematics","exp","(1 + x + x²)¹⁰\n

= ¹⁰C₀(1 + x)¹⁰ + ¹⁰C₁(1 + x)⁹.x² + ¹⁰C₂(1 + x)⁸.x⁴+ .....\n

Coefficient of x⁴\n

= ¹⁰C₀.¹⁰C₄ + ¹⁰C₁.⁹C₂ + ¹⁰C₂.⁸C₀\n

= 210 + 360 + 45\n

= 615",10,"t","exact_and","points",1.5,"10","initComment","initReply","actionData","errors"]

JEE MAIN - Mathematics (2020 - 9th January Morning Slot - No. 10)

Explanation

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