What is the number of non-zero terms in the expansion of (1+2\sqrt{3x})^{11}+(1-2\sqrt{3x})^{11} (after simplification)? [NDA I 2018]

UPSC NDA I 2018 Mathematics Solved Paper

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What is the number of non-zero terms in the expansion of (1+2√3x)11+(1−2√3x)11 (after simplification)?

[NDA I 2018]

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