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The sum of the rational terms in the expansion of $${\left( {\sqrt 2 + {3^{1/5}}} \right)^{10}}$$ is ...............
IIT-JEE 1997
the coefficient of three consecutive terms of $${\left( {1 + x} \right)^{n + 5}}$$ are in the ratio $$5:10:14.$$ Then $... JEE Advanced 2013 (Offline) ## MCQ (Single Correct Answer) More Given positive integers $$r > 1,\,n > 2$$ and that the coefficient of $$\left( {3r} \right)$$th and $$\left( {r + 2} \ri... IIT-JEE 1983 The coefficient of$${x^4}$$in$${\left( {{x \over 2} - {3 \over {{x^2}}}} \right)^{10}}$$is IIT-JEE 1983 The value of$$$\left( {\matrix{ {30} \cr 0 \cr } } \right)\left( {\matrix{ {30} \cr {10} \cr } ...
IIT-JEE 2005 Screening
If $${}^{n - 1}{C_r} = \left( {{k^2} - 3} \right)\,{}^n{C_{r + 1,}}$$ then $$k \in$$
IIT-JEE 2004 Screening
Coefficient of $${t^{24}}$$ in $${\left( {1 + {t^2}} \right)^{12}}\left( {1 + {t^{12}}} \right)\left( {1 + {t^{24}}} \ri... IIT-JEE 2003 Screening The sum$$\sum\limits_{i = 0}^m {\left( {\matrix{ {10} \cr i \cr } } \right)\left( {\matrix{ {20} \cr ...
IIT-JEE 2002 Screening
In the binomial expansion of $${\left( {a - b} \right)^n},\,n \ge 5,$$ the sum of the $${5^{th}}$$ and $${6^{th}}$$ term...
IIT-JEE 2001 Screening
For $$2 \le r \le n,\,\,\,\,\left( {\matrix{ n \cr r \cr } } \right) + 2\left( {\matrix{ n \cr {r - ... IIT-JEE 2000 Screening If in the expansion of$${\left( {1 + x} \right)^m}{\left( {1 - x} \right)^n},$$the coefficients of$$x$$and$${x^2}$$... IIT-JEE 1999 If$${a_n} = \sum\limits_{r = 0}^n {{1 \over {{}^n{C_r}}},\,\,\,then\,\,\,\sum\limits_{r = 0}^n {{r \over {{}^n{C_r}}}} ...
IIT-JEE 1998
The expansion $${\left( {x + {{\left( {{x^3} - 1} \right)}^{{1 \over 2}}}} \right)^5} + {\left( {x - {{\left( {{x^3} - 1... IIT-JEE 1992 If$${C_r}$$stands for$${}^n{C_r},$$then the sum of the series$${{2\left( {{n \over 2}} \right){\mkern 1mu} !{\mke...
IIT-JEE 1986
Coefficient of $${x^{11}}$$ in the expansion of $${\left( {1 + {x^2}} \right)^4}{\left( {1 + {x^3}} \right)^7}{\left( {1... JEE Advanced 2014 (Offline) For$$r = 0,\,1,....,$$let$${A_r},\,{B_r}$$and$${C_r}$$denote, respectively, the coefficient of$${X^r}$$in the e... IIT-JEE 2010 ## Subjective More Prove that$${2^k}\left( {\matrix{ n \cr 0 \cr } } \right)\left( {\matrix{ n \cr k \cr } } \rig...
IIT-JEE 2003
Prove that $${{{n^7}} \over 7} + {{{n^5}} \over 5} + {{2{n^3}} \over 3} - {n \over {105}}$$ is an integer for every posi...
IIT-JEE 1990
Use mathematical Induction to prove : If $$n$$ is any odd positive integer, then $$n\left( {{n^2} - 1} \right)$$ is divi...
IIT-JEE 1983
Using mathematical induction prove that for every integer $$n \ge 1,\,\,\left( {{3^{2n}} - 1} \right)$$ is divisible by ...
IIT-JEE 1996
Using mathematical induction, prove that $${}^m{C_0}{}^n{C_k} + {}^m{C_1}{}^n{C_{k - 1}}\,\,\, + .....{}^m{C_k}{}^n{C_0}... IIT-JEE 1989 Prove by mathematical induction that$$ - 5 - {{\left( {2n} \right)!} \over {{2^{2n}}{{\left( {n!} \right)}^2}}} \le {1 ...
IIT-JEE 1987
If $${\left( {1 + x} \right)^n} = {C_0} + {C_1}x + {C_2}{x^2} + ..... + {C_n}{x^n}$$ then show that the sum of the produ...
IIT-JEE 1983
If $$x$$ is not an integral multiple of $$2\pi$$ use mathematical induction to prove that : $$\cos x + \cos 2x + ....... IIT-JEE 1994 Using induction or otherwise, prove that for any non-negative integers$$m$$,$$n$$,$$r$$and$$k$$,$$\sum\limits_{m ...
IIT-JEE 1991
If $$p$$ be a natural number then prove that $${p^{n + 1}} + {\left( {p + 1} \right)^{2n - 1}}$$ is divisible by $${p^2}... IIT-JEE 1984 Given$${s_n} = 1 + q + {q^2} + ...... + {q^2};{S_n} = 1 + {{q + 1} \over 2} + {\left( {{{q + 1} \over 2}} \right)...
IIT-JEE 1984
Use mathematical induction to show that $${\left( {25} \right)^{n + 1}} - 24n + 5735$$ is divisible by $${\left( {24} \... IIT-JEE 2002 A coin probability$$p$$of showing head when tossed. It is tossed$$n$$times. Let$${p_n}$$denote the probability tha... IIT-JEE 2000 Let$$0 where $$\ge 1$$ is a natural number. {You may use the fact that $$p\sin x + \left( {1 - p} \right)\sin y \le \s... IIT-JEE 1997 Let$$n$$be a positive integer and$${\left( {1 + x + {x^2}} \right)^n} = {a_0} + {a_1}x + ............ + {a_{2n}}{x^{2...
IIT-JEE 1994
Using mathematical induction, prove that $${\tan ^{ - 1}}\left( {1/3} \right) + {\tan ^{ - 1}}\left( {1/7} \right) + ..... IIT-JEE 1993 Prove that$$\sum\limits_{r = 1}^k {{{\left( { - 3} \right)}^{r - 1}}\,\,{}^{3n}{C_{2r - 1}} = 0,} $$where$$k = \left(...
IIT-JEE 1993
Prove that $${C_0} - {2^2}{C_1} + {3^2}{C_2}\,\, - \,..... + {\left( { - 1} \right)^n}{\left( {n + 1} \right)^2}{C_n} ... IIT-JEE 1989 Let$$R = {\left( {5\sqrt 5 + 11} \right)^{2n + 1}}$$and$$f = R - \left[ R \right],$$where [ ] denotes the grea... IIT-JEE 1988 Use method of mathematical induction$${2.7^n} + {3.5^n} - 5$$is divisible by$$24$$for all$$n > 0$$IIT-JEE 1985 Prove that$${7^{2n}} + \left( {{2^{3n - 3}}} \right)\left( {3n - 1} \right)$$is divisible by 25 for any natural number... IIT-JEE 1982 Given that$${C_1} + 2{C_2}x + 3{C_3}{x^2} + ......... + 2n{C_{2n}}{x^{2n - 1}} = 2n{\left( {1 + x} \right)^{2n - 1}}$$... IIT-JEE 1979 For any positive integer$$m$$,$$n$$(with$$n \ge m$$), let$$\left( {\matrix{ n \cr m \cr } } \right) = {...
IIT-JEE 2000
For every possitive integer $$n$$, prove that $$\sqrt {\left( {4n + 1} \right)} Hence or otherwise, prove that$$\left...
IIT-JEE 2000
Let $$a,\,b,\,c$$ be possitive real numbers such that $${b^2} - 4ac > 0$$ and let $${\alpha _1} = c.$$ Prove by inductio...
IIT-JEE 2000
If $$\sum\limits_{r = 0}^{2n} {{a_r}{{\left( {x - 2} \right)}^r}\,\, = \sum\limits_{r = 0}^{2n} {{b_r}{{\left( {x - 3} \... IIT-JEE 1992 Let$$p \ge 3$$be an integer and$$\alpha $$,$$\beta $$be the roots of$${x^2} - \left( {p + 1} \right)x + 1 = 0$$us... IIT-JEE 1992 Let$$p$$be a prime and$$m$$a positive integer. By mathematical induction on$$m$$, or otherwise, prove that whenever... IIT-JEE 1998 Let$$n$$be any positive integer. Prove that$$\$\sum\limits_{k = 0}^m {{{\left( {\matrix{ {2n - k} \cr k \cr ...
IIT-JEE 1999

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