If the ellipse with the question 9x ( square) + 25y ( square) = 225 , then find the eccentricity and foci ?
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21
Hi
Here is your answer,
→ (NOTE) The distance of a points (h,k) from the focus S is called the focal distance of a point P. So, the focal distance of an point P(h,k) on the parabola y²=4ax is | h + a | ( This is the standard from of the parabola )
Given parabola is y² = 8ax
On comparing this parabola to the y² = 4ax
We get, 8x = 4ax → a = 2
∴ Focal distance = | x+a | = 4
→ | x + 2 | = 4
→ x + 2 = ( Plus of minus symbol ) 4
→ x = 2,-6
→ x ≠ -6
→ y² = 8×2
→y² = 16 → y = ( Plus or minus symbol) 4
So, the points are (2,4) and (2,-4)
Hope it helps you!
Here is your answer,
→ (NOTE) The distance of a points (h,k) from the focus S is called the focal distance of a point P. So, the focal distance of an point P(h,k) on the parabola y²=4ax is | h + a | ( This is the standard from of the parabola )
Given parabola is y² = 8ax
On comparing this parabola to the y² = 4ax
We get, 8x = 4ax → a = 2
∴ Focal distance = | x+a | = 4
→ | x + 2 | = 4
→ x + 2 = ( Plus of minus symbol ) 4
→ x = 2,-6
→ x ≠ -6
→ y² = 8×2
→y² = 16 → y = ( Plus or minus symbol) 4
So, the points are (2,4) and (2,-4)
Hope it helps you!
Answered by
26
Step-by-step explanation:
In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity.
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