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$If `A=[{(,1,2,3),(,3,-2,1),(,4,2,1)}]` then show that `A^(3)-23A-40I=0` | Class 12 Maths | Doubtnut$

This Is For All The Doubtnut Students Out There ! #40under40 #shorts #motivation #doubtnut

Doubtnut ಕನ್ನಡ

Doubtnut ಕನ್ನಡ

This Is For All The Doubtnut Students Out There ! #40under40 #shorts #motivation #doubtnut

On comparing the ratios `(a_(1))/(a_(2)), (b_(1))/(b_(2))` and `(c_(1))/ | Class 10 MATH | Doubtnut

Which component of velocity is constant in a Projectile motion ? |Class 11 PHYSICS | Doubtnut

Is zero a rational number ? Can you write it in the form `p/q`, where p and |Class 9 Math |Doubtnut

` sin 2 A = 2 sin A ` is true when A = ? | Class 10 MATH | Doubtnut

Show that the relation R in the set `A={x in z, 0 le x le 12}` given by |Class 12 MATH | Doubtnut

Represent the following situations in the form of quadratic equations : | Class 10 MATH | Doubtnut

Find the 31st term of an AP whose 11th term is 38 and the 16th term is | Class 10 MATH | Doubtnut

A vertical tree is broken by the wind at a height of 6 m from its foot a | Class 10 MATH | Doubtnut

A train travels 360 km at a uniform speed. If the speed had been 5 km | Class 10 MATH | Doubtnut

The sum of coefficients of integral powers of x in the binominal expansion |Class 12 MATH | Doubtnut

A toy in the form of a cone of radius 3.5cm mounted on a hemisphere | Class 10 MATH | Doubtnut

A wire in the form of a circular loop of one turn carrying a current pr |Class 12 PHYSICS | Doubtnut

The vapour pressure of ethyl alcohol at 298K is 40mm of Hg. Its |Class 12 CHEMISTRY | Doubtnut

What is science? |Class 11 PHYSICS | Doubtnut

Find the value of k if x-1 is the factor of`P(x)=2x^(2)+kx+sqrt(2)` |Class 9 Math |Doubtnut

Solve the following pair of linear equations by the substitution method. | Class 10 MATH | Doubtnut

A man wishes to estimate the distance of a nearby tower from him. |Class 11 PHYSICS | Doubtnut

Evalute: (b) `(sin18^(@))/(cos72^(@))` | Class 10 MATH | Doubtnut

A wheel makes 360 revolutions in one minute. Through how many |Class 11 MATH | Doubtnut

State and explain Hooke's law. |Class 11 PHYSICS | Doubtnut

The taxi fare in a city is as follows, for the first kilometre, the fare is |Class 9 Math |Doubtnut

Solve the following pair of linear equations by the substitution method. | Class 10 MATH | Doubtnut

If the roots of the equation `(a-b)x^(2)+(b-c)x+(c-a)=0` are equal, | Class 10 MATH | Doubtnut

Two finite sets have m and n elements. The number of subsets of the |Class 12 MATH | Doubtnut

Use Euclid's division lemma to show that the cube of any positive intege | Class 10 MATH | Doubtnut

Factrorise the following using appropriate identities. `9x^(2)+6xy+y^(2)`

Classify the following numbers as rational or irrational `(3+sqrt(23))-|Class 9 Math |Doubtnut

If `[(2x+y,4x),(5x-7,4x)]= [ (7,7y-13),(y ,x+6)] ` , then the value of |Class 12 MATH | Doubtnut

The moon is observed from two diametrically opposite points A and |Class 11 PHYSICS | Doubtnut

Draw a circle of radius 4 cm and construct a pair of tangents such that | Class 10 MATH | Doubtnut

`(sec8A-1)/(sec4A-1)=(tan 8A)/(tan2A)` |Class 11 MATH | Doubtnut

Define angle of minimum deviation. |Class 12 PHYSICS | Doubtnut

In `DeltaABC`, right-angled at B,AB=24cm,BC=7cm. Determine : | Class 10 MATH | Doubtnut

For which value of k will the following pair of linear equations have |Class 10 MATH | Doubtnut

The lengths of the diagonals of a rhombus are 16 cm and 12 cm. Then | Class 10 MATH | Doubtnut

The value of `((30),(0))((30),(10))+((30),(1))((30),(11))+((30),(2)) |Class 12 MATH | Doubtnut

Find the conjugate of `sqrt(3i)-1` |Class 11 MATH | Doubtnut

The degree of a linear polynomial is | Class 10 MATH | Doubtnut

Let f be a real valued function defined on `(0, 1) cup (2, 4)`, such that |Class 12 MATH | Doubtnut

Evaluate using the suitable identity. `(102)^(3)` |Class 9 Math |Doubtnut

Find the zeroes of polynomial `p(x) = 6x^(2) -3 - 7x` | Class 10 MATH | Doubtnut

1 gram of ice is mixed with 1 gram of steam. At thermal equilibrium, |Class 12 PHYSICS | Doubtnut

The value of `(2tan30^(@))/(1+tan^(2)30^(@))` is : | Class 10 MATH | Doubtnut

`alpha+beta` are the zeroes of the polynomial `x^(2)-6x+4`, then the valu | Class 10 MATH | Doubtnut

Give the expression for magnetic field due to a toroid. |Class 12 PHYSICS | Doubtnut

`lim_(x rarr oo) ((x^(2) + 5x + 3)/(x^(2) + x + 2))^(x)` is : |Class 12 MATH | Doubtnut

Determine whether the relation R in the set A={1,2,3,..........13,14} def |Class 12 MATH | Doubtnut

Convert `40^(@),20'` into radian measure. |Class 11 MATH | Doubtnut

If `y=cos^(-1)e^(x)," find "(dy)/(dx)` |Class 12 MATH | Doubtnut

Which of the followings pairs of linear equations has unique solution, | Class 10 MATH | Doubtnut

Show that the distance between any two consecutive nodes or antinodes |Class 11 PHYSICS | Doubtnut

Show that the relation S in the set R of real numbers defined as `S={(a, |Class 12 MATH | Doubtnut

Classify the following numbers as rational or irrational `(2sqrt(7))/(7sqr` |Class 9 Math |Doubtnut

Find the centre and radius of the circle `x^(2)+y^(2)-4x-8y-45=0` ? |Class 11 MATH | Doubtnut

State which pairs of triangles in Fig are similar. Write the similarity | Class 10 MATH | Doubtnut

If the area of the triangle with vertices (2,-6),(5,4) and (K,4) is 35 sq |Class 12 MATH | Doubtnut

By using elementary operations, Find the inverse of the matrix `|Class 12 MATH | Doubtnut

The trigonometric equation `sin^(-1) x=2 sin^(-1)` a has a solution |Class 12 MATH | Doubtnut

50.0 kg of `N_(2) (g)` and 10.0 kg of `H_(2)` (g) are mixed, to |Class 11 CHEMISTRY | Doubtnut

How does benzaldehyde reacts with acetophenone in presence of |Class 12 CHEMISTRY | Doubtnut

Derive the equation for work done in case of isothermal process. |Class 11 PHYSICS | Doubtnut

What is the direction of electric field due to a positive charge? |Class 12 PHYSICS | Doubtnut

Find the vector equation of the line, passing through the points (-1,0,2) |Class 12 MATH | Doubtnut

The altitude of a right triangle is 7 cm less than its base . If the hypo | Class 10 MATH | Doubtnut

If zeros of a quadratic polynomial `x^(2) + (a +1) x + b` are 2 and -3, | Class 10 MATH | Doubtnut

`(sin^(2) theta)/(1-cos theta)-(cos^(2) theta)/(1-sin theta)=cos |Class 11 MATH | Doubtnut

For any square matrix A with real numbers, prove that `A + A'` is a |Class 12 MATH | Doubtnut

A solid cylinder of radius R made of a material of thermal |Class 12 PHYSICS | Doubtnut

Prove that `|(x,x^2,yz),(y,y^2,zx),(z,z^2,xy)|= (x-y)(y-z)(z-x)(xy + yz |Class 12 MATH | Doubtnut

If `y=tan^(-1)((sin x + cos x)/(cos x - sin x))`, then `(dy)/(dx)` is equa |Class 12 MATH | Doubtnut

The potential difference between A and B in the following figure is : |Class 12 PHYSICS | Doubtnut

Solve for x and y: `2x+3y=7" and "6x+5y=11`. | Class 10 MATH | Doubtnut

A train is travelling at the speed of 90km/h. Brakes are applied so as |Class 9 PHYSICS |Doubtnut

Convert the following temperature to the Celsius scale. 470 K | Class 9 PHYSICS | Doubtnut

Write down the decimal expansions of `13/3125` | Class 10 MATH | Doubtnut

An air bubble in a glass slab `(n = 1.5)` is 5 cm deep when viewed fro |Class 12 PHYSICS | Doubtnut