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Binomial Theorem — Maths STD 11 Science — Question

CBSE BoardEnglish MediumSTD 11 ScienceMathsBinomial Theorem1 Mark
MCQ
${ }^{(2 n+1)} C_0-{ }^{(2 n+1)} C_1+{ }^{(2 n+1)} C_2-\ldots .{ }^{2 n+1} C_{2 n}=$
  • ✓
    $1$
  • B
    $2^{2n}$
  • C
    $-1$
  • D
    $0$
✓

Answer

Correct option: A.
$1$
In some questions, substituting $n =$ a positive number in both the question and the answer is the fastest way to achieve the correct option.
Although there is always alternate options like writing the general term and splitting it to a format that can be solved but that takes long in a limited time paper.
Try to put $n = 1.$
In the end only option $A$ remains.

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