Doubtnut
18,806 old videos with fewer than 5,000 views from this channel.
-
2:31
IIT JEE PERMUTATIONS AND COMBINATIONS Eleven animals of a circus have to be placed in eleven cage...
-
1:57
IIT JEE PERMUTATIONS AND COMBINATIONS Find the number of ways in which 5 girls and 5 boys can be ...
-
5:16
IIT JEE PERMUTATIONS AND COMBINATIONS The letters of word ZENITH are written in all possible ways...
-
3:06
IIT JEE PERMUTATIONS AND COMBINATIONS How many four-digit numbers can be formed by using the digi...
-
3:02
IIT JEE PERMUTATIONS AND COMBINATIONS If the best and the worst paper never appear together, find...
-
2:48
Find the number of seen letter words that can be formed by using the
letters of the word SUC...
-
2:14
IIT JEE PERMUTATIONS AND COMBINATIONS There are `n`
married couples at a party. Each person shake...
-
3:17
IIT JEE PERMUTATIONS AND COMBINATIONS In a certain an algebraical exercise book there and 4 examp...
-
4:19
IIT JEE PERMUTATIONS AND COMBINATIONS If `^15 C_(3r):^(15)C_(r+1)=11 :3`
, find the value of `rdot`
-
2:58
IIT JEE PERMUTATIONS AND COMBINATIONS Prove that `"^n C_r+^(n-1)C_r+...+^r C_r=^(n+1)C_(r+1)`
.
-
4:02
IIT JEE PERMUTATIONS AND COMBINATIONS Find the value (s) of `r`
satisfying the equation `"^69 C_...
-
3:16
IIT JEE PERMUTATIONS AND COMBINATIONS Find the number of ways in which 6 boys and 6 girls can be ...
-
6:02
IIT JEE PERMUTATIONS AND COMBINATIONS The number of ways in which the letters of the word ARRANGE...
-
2:26
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Prove that graphs of `y=x^2+2a n dy=3x-4`
never i...
-
3:54
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Find how many roots of the equations `x^4+2x^2-8x...
-
2:27
IIT JEE LIMITS AND DERIVATIVES If `e^y(x+1)=1,s howt h a t(d^2y)/(dx^2)=((dy)/(dx))^2dot`
-
5:43
IIT JEE LIMITS AND DERIVATIVES Evaluate:
`("lim")_(xvec7/2)(2x^2-9x+8)^(cot(2x-7))`
-
5:56
IIT JEE LIMITS AND DERIVATIVES If `y=xlog"{"x/((a+b x))"]"`
, then show that
`x^3(d^2y)/(dx^2)=(x...
-
3:09
JEE MAINS 2018 Find the locus of the point which is equidistant
from the points `A(0,2,3)a n ...
-
3:27
IIT JEE TRIGONOMETRIC FUNCTIONS Sum of roots of the equation `x^4-2x^2sin^2(pix/2)+1=0`
is
`0`
...
-
2:24
IIT JEE LIMITS AND DERIVATIVES If `x=a(cost+tsint)`
and `y=a(sint-tcost),fin d(d^2y)/(dx^2)dot`
-
3:54
IIT JEE TRIGONOMETRIC FUNCTIONS One of the general solutions of `sqrt(3) cos theta-3 sin theta=4 ...
-
4:25
IIT JEE LIMITS AND DERIVATIVES If `alpha_1, ,alpha_2, ,alpha_n`
are the roots of equation `x^n+n ...
-
3:48
IIT JEE TRIGONOMETRIC FUNCTIONS In a right angled triangle the hypotenuse is `2sqrt(2)`
times th...