Doubtnut
19,218 old videos with fewer than 5,000 views from this channel.
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7:54
IIT JEE RELATIONS AND FUNCTIONS The domain of the function `f(x)=sqrt(log_((|x|-1))(x^2+4x+4))`
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3:11
IIT JEE BINOMIAL THEOREM `hat A hat A 404 C4 hatA hat aprime hat A hat A 4C1 hat A hat A hat A 30...
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3:10
JEE MAINS 2018 Form the differential equation corresponding to `y^2-2a y+x^2=a^2`
by eliminating...
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6:35
IIT JEE BINOMIAL THEOREM The value of `("^n C_0)/n`+`("^nC_1)/(n+1)`+`("^nC_2)/(n+2)`+....+`("^n...
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5:43
IIT JEE BINOMIAL THEOREM If `(3+x^(2008)+x^(2009))^(2010)=a_0+a_1x+a_2x^2++a_n x^n ,`
then the va...
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1:48
Solve the following quadratic equations by factorization method:
`x^2+(a/(a+b)+(a+b)/a)x+1=0`
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2:42
IIT JEE SEQUENCES AND SERIES If `1^2+2^2+3^2++2003^2=(2003)(4007)(334)a n d(1)(2003)+(2)(2002)+(3...
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2:03
IIT JEE LIMITS AND DERIVATIVES If `y=(x+sqrt(x^2+a^2))^n ,t h e n(dy)/(dx)`
is
(a)`(n y)/(sqrt...
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1:05
IIT JEE SEQUENCES AND SERIES If `t_n`
denotes the nth term of the series `2+3+6+11+18+...t h e nt...
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4:03
IIT JEE TRIGONOMETRIC FUNCTIONS The upper `3/4`
th portion of a vertical pole subtends an angle `...
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4:39
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS If the cubic `2x^3-9x^2+12 x+k=0`
has two equal ...
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4:23
IIT JEE RELATIONS AND FUNCTIONS The domain of `f(x)=ln(a x^3+(a+b)x^2+(b+c)x+c),`
where `a gt 0,...
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3:20
IIT JEE RELATIONS AND FUNCTIONS If `f(x+1/2)+f(x-1/2)=f(x)fora l lx in R ,`
then the period of `f...
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4:16
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS If `a+b+c=0,a^2+b^2+c^2=4,t h e na^4+b^4+c^4`
is_...
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1:18
IIT JEE SEQUENCES AND SERIES The coefficient of `x^(19)`
in the polynomial `(x-1)(x-2)(x-2^2)(x-2...
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5:37
IIT JEE TRIGONOMETRIC FUNCTIONS For a positive integer `n ,`
let
`f_n(theta)=(tantheta//2)(1+se...
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6:00
IIT JEE COMPLEX NUMBERS AND QUADRATIC EQUATIONS Prove that the roots of the equation `x^4-2x^2+4=...
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2:05
IIT JEE APPLICATION OF DERIVATIVES The slope of the tangent to the curve `y=sqrt(4-x^2)`
at the p...
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2:37
IIT JEE TRIGONOMETRIC FUNCTIONS The positive integer value of `n gt 3`
satisfying the equation
`1...
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1:53
Show that the differential equation of which `y=2(x^2-1)+c e^-x^2` is a solution, is `(dy)/(dx)+...
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2:27
IIT JEE SEQUENCES AND SERIES If `l ,m ,n`
are the three positive roots of the equation `x^3-a x^2...
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1:39
IIT JEE SEQUENCES AND SERIES The minimum value of `P=b c x+c a y+a b z ,`
when `x y z=a b c`
, is
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0:53
JEE MAINS 2018 Show that `y=c x+a/c`
is a solution of the differential equation `y=x(d^y)/(dx^)+...
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12:11
For the following hyperbolas find the lengths of transverse and conjugate axes, eccentricity and...