Tag: mathematics and statistics

Questions Related to mathematics and statistics

The area of the triangle formed by the asymptotes and any tangent to the hyperbola ${x}^{2}-{y}^{2}={a}^{2}$ is 

  1. ${4a}^{2}$

  2. ${3a}^{2}$

  3. ${2a}^{2}$

  4. ${a}^{2}$


Correct Option: A

If foci of hyperbola lie on $y=x$ and one of the asymptote is $y=2x$, then equation of the hyperbola, given that is passes through $(3, 4)$ is :

  1. $x^2-y^2-\dfrac {5}{2}xy+5=0$

  2. $2x^2-2y^2+5xy+5=0$

  3. $2x^2+2y^2-5xy+10=0$

  4. None of these


Correct Option: C
Explanation:

Foci of hyperbola lie on $y=x$.
So, the equation of transverse axis is $y-x=0$.
Transverse axis of hyperbola bisects the asymptote
$\Rightarrow$ equation of other asymptote is $y=\dfrac{x}{2}$
or,$x=2y$
$\Rightarrow$ Equation of hyperbola is $(y-2x)(x-2y)+k=0$
Since, it passes through $(3, 4)$
$\Rightarrow k=-10$
Hence, required equation is
$2x^2+2y^2-5xy+10=0$

The combined equation of the asymptotes of the hyperbola $2{x}^{2}+5xy+2{y}^{2}+4x+5y=0$ is

  1. $2{x}^{2}+5xy+2{y}^{2}+4x+5y+2=0$

  2. $2{x}^{2}+5xy+2{y}^{2}+4x+5y-2=0$

  3. $2{x}^{2}+5xy+2{y}^{2}=0$

  4. None of these


Correct Option: A

The ordinate of any point P on the hyperbola, given by  $25x^2-16y^2=400$, is produced to cut its asymptotes in the points Q and R, then $QP.PR=5.$

  1. True

  2. False


Correct Option: B

If the x-y+4=0 and x+y+2=0 are asymptotes of a hyperbola , the its center is 

  1. (-3,1)

  2. (3,1)

  3. (-3,-1)

  4. (3,-1)


Correct Option: A

A chord $AB$ which bisected at $(1,1)$ is drawn to the hyperbola $7x^{2}+8xy-y^{2}-4=0$ with centre $C$. which intersects its asymptotes in $E$ and $F$. If equation of circumcricel of $\triangle CEF$ is $x^{2}+y^{2}-ax-by+c=0$, then value of $\dfrac{23(a-b+c)}{12}$ is equal to 

  1. $1$

  2. $2$

  3. $3$

  4. $4$


Correct Option: A

The product of the lengths of perpendiculars drawn from any point on the hyperbola $x^{2}-2y^{2}-2=0$ to its asymptotes is 

  1. 1/2

  2. 2/3

  3. 3/2

  4. 2


Correct Option: A

The angle between the asymptotes of the hyperbola $\dfrac{x^{2}}{a^{2}}-\dfrac{y^{2}}{b^{2}}=1$, the length of whose latus rectum is $\dfrac{4}{3}$ and hyperbola passes through the point $(4,2)$ is :

  1. $\dfrac{\pi}{6}$

  2. $\dfrac{\pi}{2}$

  3. $\dfrac{\pi}{3}$

  4. $\dfrac{\pi}{4}$


Correct Option: A

The angle between the asymptotes of a hyperbola is $30^{o}$. The eccentricity of the hyperbola may be

  1. $\sqrt{3}\pm 1$

  2. $\sqrt{3}+1$

  3. $\pm\sqrt{2}$

  4. $none\ of\ these$


Correct Option: D

If the equation $3x^{2}+xy-y^{2}-3x+6y+2=0$ represents hyperbola then equation of the asymptotes is given by

  1. $3x^{2}+xy-y^{2}-3x+6y-9=0$

  2. $3x^{2}+xy-y^{2}-3x+6y-7=0$

  3. $3x^{2}+xy-y^{2}-3x+6y=0$

  4. $none of these$


Correct Option: A