The coefficient of $x^{10}$ in the expansion of $(1+2 x)^{-7}$ is

$2^{10}\left(\begin{array}{c}16 \\ 9\end{array}\right)$

$\left(\begin{array}{c}16 \\ 6\end{array}\right)$

JEE MATHEMATICS MCQ: BINOMIAL THEOREM

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Application +4 | -1

The coefficient of

x^{10}

in the expansion of

(1+2 x)^{-7}

View answer and explanation

Correct option: B

2^{10}\left(\begin{array}{l}16 \\ 10\end{array}\right)

Option A (

2^{10}\left(\begin{array}{l}17 \\ 10\end{array}\right)

) is incorrect. Option B (

2^{10}\left(\begin{array}{l}16 \\ 10\end{array}\right)

) is the correct answer because it is derived from the general term in the binomial expansion of

(1+2x)^{-7}

Practice All Chapter MCQs →

\left({ }^{10} C_0\right)^2-\left({ }^{10} C_1\right)^2+\ldots-\left({ }^{10} C_9\right)^2+\left({ }^{10} C_{10}\right)^2

a

d

\left( {n + 1} \right)

a{C_0} - \left( {a + d} \right){C_1} + \left( {a + 2d} \right){C_2} - ... + ...

(1-x)^{201}\left(1+x+x^2\right)^{200}

\left(\frac{1}{x}+2 x\right)^n

{x^5}

\frac{{1 + {x^2}}}{{1 + x}},\left| x \right| < 1,

\left(\begin{array}{c}2 n+1 \\ 0\end{array}\right)+\left(\begin{array}{c}2 n+1 \\ 3\end{array}\right)+\left(\begin{array}{c}2 n+1 \\ 6\end{array}\right)+\ldots=170

n