MCQ
If the length of the major axis of an ellipse is three times the length of the minor axis then its eccentricity is:
  • A
    $\frac{1}{3}$
  • B
    $\frac{1}{\sqrt{3}}$
  • C
    $\frac{1}{\sqrt{2}}$
  • $\frac{2\sqrt{2}}{\sqrt{2}}$

Answer

Correct option: D.
$\frac{2\sqrt{2}}{\sqrt{2}}$
  1. $\frac{2\sqrt{2}}{\sqrt{2}}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The average of a collection of 20 measurements was calculated to be 56 cm. But later it was found that a mistake occured in one of the measurements which was recorded as 64 cm but should have been 61 cm. What is the correct average?
The mean deviation of the numbers 3, 4, 5, 6, 7 from the mean is:
If $A = \{x : x$ is a multiple of $4\}$ and $B = \{x : x$ is a multiple of $6\}$ then $A \cap B$ consists of all multiples of
If a represents the number of permutations of (x + 2) things taken together b represents the number of permutation of 11 things taken together out of x things, and c represents the number of permutation of(x – 11)things taken together so that a = 182, bc = then x is equal to:
For each $t \in R$ ,let $\left[ t \right]$ be the greatest interger less than or equal to $t$ . Then $\mathop {\lim }\limits_{x \to 0 + } x\left( {\left[ {\frac{1}{x}} \right] + \left[ {\frac{2}{x}} \right] + .\;.\;.\; + \left[ {\frac{{15}}{x}} \right]} \right) =$ . .. . .
The least value of k which makes the roots of the equation $x^2+5 x+k=A 0$ imaginary is:
  1. 4
  2. 5
  3. 6
  4. 7
Let a line perpendicular to the line $2 x-y=10$ touch the parabola $y^2=4(x-9)$ at the point $P$. The distance of the point $\mathrm{P}$ from the centre of the circle $x^2+y^2-14 x-8 y+56=0$ is ...........
Two sides of a parallelogram are along the lines $4 x+5 y=0$ and $7 x+2 y=0$. If the equation of one of the diagonals of the parallelogram is $11 \mathrm{x}+7 \mathrm{y}=9$, then other diagonal passes through the point:
If x > 7 then which is impossible?
General solution of $eq^n\, 2tan\theta \, -\, cot\theta  =\, -1$ is