Doubtnut
1,680 old videos with fewer than 5,000 views from this channel.
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5:39
Consider an equation `log_2 (alpha^6 - 16alpha^3 + 66) + sqrt(4beta^4 - 8beta^2+13)|[gamma/3-2
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`(x-2)^(100)=sum_(r=0)^100 a_r x^r`, then `a_1+2a_2+......+100a_100=`
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JEE MAINS 2018 Find the value of ` 1xx1!+2xx2!+3xx3!+.......+nxxn !`
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Number of triplets of primes such that pq =r+1 and `2(p^2 + q^2) = r^2 + 1` is
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There are two numbers. One of the number is 3 times the other number. If their sum is 20, then
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The sum of two consecutive natural numbers is 61. The numbers are
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The term free from x in the expansion of `( 1/x^2 +1/x +1 +x+x^2)` is
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If the vertices of a triangle are `(sqrt5, 0), (sqrt3, sqrt2), and (2, 1)`, then the orthoce
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The circles `x^2 + y^2 + 2g_1x- a^2=0 and x^2 + y^2 + 2g_2x-a^2 = 0` cut each other orthogonal
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The area of `int_-10^10 f(x)dx`, where `f(x)=min{x-[x],-x-[-x]}`, where [ ] is `G.L.E.`, is
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Evaluate, `lim_(n- gt oo) ((1+4^(1/n))/2)^n`
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Rs 300 amounts to 360 in 4 years at simple interest. If the rate of interest is increased by 1
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Khilona earned scores of 97, 73 and 88 respectively in her first three examinations. If she s
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If the circumcentre of a triangle lies outside the triangle then the triangle is
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If `g(x)` is the inverse of `f(x) and f(x)` has domain `x in [1,5]`, where `f(1)=2 and f(5)
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The outer radius of a ring is (x + 2y) cm and the width is (x + y) cm. What is the area of the
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The middle term in the expansion of `(1-3x+3x^2-x^3)^(2n)` is
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4. If the first and last terms of an A.P. are 1 and 11 respectively and the sum of its terms
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`int(x^2dx)/((x+1)(x+2)^2)`
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3. The length of double ordinate of parabola `y^2 = 8x` which subtends an angle `60^@` at ver
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In a scalene triangle, one side exceeds the other two sides by 4 cm and 5 cm respectively and
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A straight line passes through the point `(1, 2)` and is such that the portion of it intercep
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The sum of `3/1.2 *1.2+4/2.3*(1/2)^2+5/3.4*(1/2)^3+.........` to n terms is equal to
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If `a+b+c=6` then the maximum value of `sqrt(4a+1)+sqrt(4b+1)+sqrt(4c+1)=`