Doubtnut
19,218 old videos with fewer than 5,000 views from this channel.
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2:48
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS For `x^2-(a+3)|x|+4=0`
to have real solutions, th...
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2:05
If the equation `x^2=a x+b=0`
has distinct real roots and `x^2+a|x|+b=0`
has only one real root...
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2:19
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS If `alpha,beta`
are the roots of the quadratic ...
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2:27
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS The value of expression `x^4-8x^3+18 x^2-8x+2w h ...
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4:49
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Referred to the principal axes as the axes of co ...
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2:43
If the quadratic equation `a x^2+b x+c=0(a gt0)`
has `sec^2thetaa n dcos e c^2theta`
as its ro...
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3:43
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Let `z_1, z_2, z_3`
be three complex numbers and ...
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1:47
In Figure, `l`
is a line intersecting the two concentric circles, whose common centre
is `O ...
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2:02
IIT JEE SEQUENCES AND SERIES If the sides of a triangle are in G.P., and its largest angle is tw...
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2:44
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Find the relation if `z_1, z_2, z_3, z_4`
are the...
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4:21
IIT JEE BINOMIAL THEOREM Find the remainder when `x=5^(5^5^(5)`
(24 times 5) is divided by 24.
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5:19
IIT JEE BINOMIAL THEOREM Prove that `sqrt(10)[(sqrt(10)+1)^(100)-(sqrt(10)-1)^(100)]` is an even ...
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2:32
IIT JEE LOGARITHM If `(log)_b a(log)_c a+(log)_a b(log)_c b+(log)_a c(log)_bc=3`
(where `a , b ,...
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2:51
IIT JEE SEQUENCES AND SERIES Consider the ten numbers `a r ,a r^2, a r^3, ..... ,a r^(10)dot`
If...
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1:33
IIT JEE SEQUENCES AND SERIES Let `a=111....1(55d igi t s),b=1+10^2+....+10^4,c=1+10^5+10^(10)+10^...
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3:55
IIT JEE TRIGONOMETRIC FUNCTIONS If `xsina+ysin2a+zsin3a=sin4a`
`xsinb+ysin2b+zsin3b=sin4b`,
...
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7:13
IIT JEE PERMUTATIONS AND COMBINATIONS Seven people leave their bags outside al temple and returni...
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1:33
IIT JEE LOGARITHM The value of `x`
satisfying the equation
`3sqrt(5)^((log_5) 5^(((log)_5(log)_...
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3:20
IIT JEE TRIGONOMETRIC FUNCTIONS Two medians drawn from the acute angles of a right angled triangl...
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2:12
IIT JEE LOGARITHM if `(log)_y x+(log)_x y=2,x^2+y=12 ,`
the value of `x y`
is
9 (b) 12 (c) 15 ...
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3:38
IIT JEE TRIGONOMETRIC FUNCTIONS Which of the following statements are always correct (where Q den...
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0:54
IIT JEE PERMUTATIONS AND COMBINATIONS Find the total number of ways of answering five objective t...
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3:33
Find the area of the triangle formed by the lines joining the vertex of he parabola `x^2=12 y` t...
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5:20
IIT JEE TRIGONOMETRIC FUNCTIONS In triangle `A B C ,`
dedians `A Da n dC E`
are drawn. If `A D=5,...