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Just one question and 1 check answer!

 

Q1

 

 

Check:

 Dec 6, 2019
 #1
avatar+109241 
+1

First one.....the major axis lies along y

 

So

 

24  =  a^2

sqrt (24)  = sqrt (4 * 6)    =  s sqrt (6)  =  a

The major axis   = 2a =  2  (2sqrt (6) ) =   4sqrt (6)

 

The minor axis lies along  x

 

So

 

12 =  b^2

sqrt (12)  =sqrt ( 4 * 3)  =  2sqrt (3)  = b

The minor axis  = 2b = 2 ( 2 sqrt (3)) = 4 sqrt ( 3)

 

 

cool cool cool

 Dec 6, 2019
 #2
avatar+109241 
0

Second one

 

center  =  ( 1,6)

focus  = (-1, 6)    means that c   = 2

vertex  (6,6)   means that a  =  5 ⇒   a^2 = 25

And b^2  = a^2 - c^2 =  5^2 - 2^2  = 21

 

So....the equation is

 

( x - 1)^2            ( y - 6)^2

_______   +     _________   =     1

    25                     21

 

 

 

cool cool cool

 Dec 6, 2019

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