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$If the 5^{th} term is 24 times the 3^{rd} term in the expansion of (1 + x)^{11} the x =$

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Correct option is B

5th term =243rd term ⇒11C4x4=24 11C2x2⇒x2=24⋅ 11C2 11C4=24⋅11!2!9!×4!7!11!=4⇒x=±2

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If the 5th term is 24 times the 3rd term in the expansion of (1+x)11 the x=

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Ready to Test Your Skills?

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$If the 5^{th} term is 24 times the 3^{rd} term in the expansion of (1 + x)^{11} the x =$