1.

Middle term in the expansion of \[{{(1+3x+3{{x}^{2}}+{{x}^{3}})}^{6}}\]is [MP PET 1997]

A. \[{{4}^{th}}\]
B. \[{{3}^{rd}}\]
C. \[{{10}^{th}}\]
D. None of these
Answer» D. None of these


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