# Binomial Theorem · Mathematics · WB JEE

Start Practice## MCQ (Single Correct Answer)

WB JEE 2008

If the magnitude of the coefficient of x7 in the expansion of $${\left( {a{x^2} + {1 \over {bx}}} \right)^8}$$, where a, b are positive numbers, is eq...

WB JEE 2008

If $${}^{16}{C_r} = {}^{16}{C_{r + 1}}$$, then the value of $${}^r{P_{r - 3}}$$ is

WB JEE 2008

The coefficient of x$$-$$10 in $${\left( {{x^2} - {1 \over {{x^3}}}} \right)^{10}}$$ is

WB JEE 2009

If C0, C1, C2, ......, Cn denote the coefficients in the expansion of (1 + x)n then the value of C1 + 2C2 + 3C3 + ..... + nCn is...

WB JEE 2009

If the coefficients of x2 and x3 in the expansion of (3 + ax)9 be same, then the value of a is

WB JEE 2009

using binomial theorem, the value of (0.999)3 correct to 3 decimal places is

WB JEE 2010

$$({2^{3n}} - 1)$$ will be divisible by $$(\forall n \in N)$$

WB JEE 2010

If in the expansion (a $$-$$ 2b)n, the sum of the 5th and 6th term is zero, then the value of $${a \over b}$$ is...

WB JEE 2010

Sum of the last 30 coefficients in the expansion of (1 + x)59, when expanded in ascending powers of x is

WB JEE 2010

If $${(1 - x + {x^2})^n} = {a_0} + {a_1}x + {a_2}{x^2} + \,\,....\,\,{a_{2n}}{x^{2n}}$$, then the value of $${a_0} + {a_2} + {a_4} + \,\,....\,\,{a_{2...

WB JEE 2011

The coefficient of xn om the expansion of $${{{e^{7x}} + {e^x}} \over {{e^{3x}}}}$$ is

WB JEE 2011

If A and B are coefficients of xn in the expansions of (1 + x)2n and (1 + x)2n $$-$$ 1 respectively, then A/B is equal to...

WB JEE 2011

If n > 1 is an integer and x $$\ne$$ 0, then (1 + x)n $$-$$ nx $$-$$ 1 is divisible by

WB JEE 2024

If $$\left(1+x+x^2+x^3\right)^5=\sum_\limits{k=0}^{15} a_k x^k$$ then $$\sum_\limits{k=0}^7(-1)^{\mathbf{k}} \cdot a_{2 k}$$ is equal to

WB JEE 2024

The coefficient of $$a^{10} b^7 c^3$$ in the expansion of $$(b c+c a+a b)^{10}$$ is

WB JEE 2022

The number of zeros at the end of $$\left| \!{\underline {\,
{100} \,}} \right. $$ is

WB JEE 2021

For x$$\in$$R, x $$\ne$$ $$-$$1, if $${(1 + x)^{2016}} + x{(1 + x)^{2015}} + {x^2}{(1 + x)^{2014}} + ..... + {x^{2016}} = \sum\limits_{i = 0}^{2016} {...

WB JEE 2021

The coefficient of a3b4c5 in the expansion of (bc + ca + ab)6 is

WB JEE 2020

If c0, c1, c2, ......, c15 are the binomial coefficients in the expansion of (1 + x)15, then the value of $${{{c_1}} \over {{c_0}}} + 2{{{c_2}} \over ...

WB JEE 2019

The number of irrational terms in the expansion of $${\left( {{3^{{1 \over 8}}} + {5^{{1 \over 4}}}} \right)^{84}}$$ is

WB JEE 2018

The number (101)100 $$-$$ 1 is divisible by

WB JEE 2018

If n is even positive integer, then the condition that the greatest term in the expansion of (1 + x)n may also have the greatest coefficient, is...

WB JEE 2017

Let $${(1 + x + {x^2})^9} = {a_0} + {a_1}x + {a_2}{x^2} + ... + {a_{18}}{x^{18}}$$. Then,

## Subjective

WB JEE 2009

Show that, for a positive integer n, the coefficient of xk (0 $$\le$$ k $$\le$$ n) in the expansion of 1 + (1 + x) + (1 + x)2 + ....... + (1 + x)n is ...

## MCQ (More than One Correct Answer)

WB JEE 2024

If $$n$$ is a positive integer, the value of $$(2 n+1){ }^n C_0+(2 n-1){ }^n C_1+(2 n-3){ }^n C_2 +\ldots .+1 \cdot{ }^n C_n$$ is

WB JEE 2021

The remainder when $${7^{{7^{{7^{{{..}^7}}}}}}}$$ (22 time 7) is divided by 48 is