Doubtnut
19,218 old videos with fewer than 5,000 views from this channel.
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5:32
IIT JEE APPLICATION OF DERIVATIVES If the area of the triangle included between the axes and any...
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2:32
IIT JEE TRIGONOMETRIC FUNCTIONS The base `B C`
of ` A B C`
is fixed and the vertex `A`
moves, sat...
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6:03
IIT JEE APPLICATION OF DERIVATIVES Prove that the equation of the normal to `x^(2/3)+y^(2/3)=a^(...
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2:15
IIT JEE SEQUENCES AND SERIES If `a ,bc ,d`
are in G.P, then `(b-c)^2+(c-a)^2+(d-b)^2`
is equal to...
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1:57
IIT JEE LOGARITHM If `S={x in R :((log)_(0. 6)0. 216)(log)_5(5-2x)lt=0},`
then `S`
is equal to
...
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4:20
IIT JEE RELATIONS AND FUNCTIONS If `f(x+y)=f(x)+f(y)-x y-1AAx , y in Ra n df(1)=1,`
then the numb...
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2:11
IIT JEE SEQUENCES AND SERIES If `x ,y ,z`
are real and `4x^2+9y^2+16 z^2-6x y-12 y z-8z x=0,t h ...
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4:22
IIT JEE TRIGONOMETRIC FUNCTIONS The area of a regular polygon of `n`
sides is (where `r`
is inrad...
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4:04
IIT JEE RELATIONS AND FUNCTIONS The domain of the function `f(x)=1/(sqrt({sinx}+{sin(pi+x)}))`
...
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3:19
IIT JEE TRIGONOMETRIC FUNCTIONS Prove that in ` A B C ,tanA+tanB+tanCgeq3sqrt(3,)`
where `A , B ...
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2:05
IIT JEE SEQUENCES AND SERIES If `a_1, a_2, a_3, a_n`
are in H.P. and `f(k)=(sum_(r=1)^n a_r)-a_k...
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4:52
IIT JEE BINOMIAL THEOREM In the expansion of `(5^(1//2)+7^(1//8))^(1024),`
the number of integral...
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3:18
IIT JEE RELATIONS AND FUNCTIONS
f(x)=`cosx/([2x/pi]+1/2)`
where
x
is not an integral mult...
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2:13
IIT JEE SEQUENCES AND SERIES The 15th term of the series `2 1/2+1 7/(13)+1 1/9+(20)/(23)+ i s`
`...
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4:11
IIT JEE RELATIONS AND FUNCTIONS Let `f:[-1, 10]vecR ,w h e r ef(x)=sinx+[(x^2)/a],`
be an odd fun...
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3:58
IIT JEE LOGARITHM Which of the following is not the solution of `(log)_x(5/2-1/x) gt 1`
`(a)( ...
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2:45
IIT JEE SEQUENCES AND SERIES If `a_1, a_2, a_n`
are in A.P. with common difference `d!=0`
, the...
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2:41
IIT JEE SEQUENCES AND SERIES The sum of 50 terms of the series `1+2(1+1/(50))+3(1+1/(50))^2+`
is ...
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3:00
IIT JEE LOGARITHM The true solution set of inequality `(log)_((x+1))(x^2-4) gt 1`
is equal to
`2,...
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5:42
IIT JEE APPLICATION OF DERIVATIVES Prove that the curves `y=f(x),[f(x) gt 0],a n dy=f(x)sinx ,w ...
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2:45
IIT JEE BINOMIAL THEOREM If `(1+x)^n=sum_(r=0)^n C_r x^r ,`
then prove that `C_1+2c_2+3C_1++n C_n...
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3:09
The length of two parallel chords of a circle are `6c m`
and `8c mdot`
If the smaller chord is ...
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3:33
IIT JEE SEQUENCES AND SERIES The sum of 50 terms of the series `3/(1^2)+5/(1^2+2^2)+7/(1^2+2^2+3^...
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4:19
IIT JEE BINOMIAL THEOREM If `(1+x+x^2++x^p)^n=a_0+a_1x+a_2x^2++a_(n p)x^(n p),`
then find the val...