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Mathematics 18 Online
OpenStudy (anonymous):

What are the vertices of the hyperbola given by the equation?

OpenStudy (anonymous):

OpenStudy (anonymous):

first you need to find the center of the hyperbola. do you know what this is?

OpenStudy (anonymous):

do you know how to find the center of a hyperbola?

OpenStudy (anonymous):

Not exactly? can you show me :)

OpenStudy (anonymous):

the standard form of a hyperbola is (check image attached) where (h, k) is the centre.

OpenStudy (anonymous):

so in this case what will be our centre if you compare it to your hyperbola equation?

OpenStudy (anonymous):

wait am i getting the values for the variables from the original? :/

OpenStudy (anonymous):

we are trying to get to find the vertices. you have your hyperbola equation. so i gave you the standard form of a hyperbola. to find the vertices, first we find the center. which is (h,k) from the standard form of a hyperbola that i gave you. so now compare this to YOUR hyperbola equation and get the centre (h,k). do you understand now?

OpenStudy (anonymous):

-5,-8?

OpenStudy (anonymous):

no. close. but wrong answer. the center is (5, 8)

OpenStudy (anonymous):

so now that we have the center (h,k). for your hyperbola. the vertices will be (h + a, k) and (h - a, k). So now if you work this out. you can find the vertices of your hyperbola :)

OpenStudy (anonymous):

(5+9,8) and (h-9,8)?

OpenStudy (anonymous):

(5+9,8) and (5-9,8)? **

OpenStudy (anonymous):

no. first what is the value of a?

OpenStudy (anonymous):

look carefully at the denominator of the x term. it's \[a ^{2}\]. but we are interested in \[a\]

OpenStudy (anonymous):

9?

OpenStudy (anonymous):

no. \[a ^{2} = 9\]

OpenStudy (anonymous):

what now then will be our value for \[a\] ?

OpenStudy (anonymous):

3?

OpenStudy (anonymous):

nice. so now find (h + a, k) and (h - a, k) which will be our vertices for this hyperbola :)

OpenStudy (anonymous):

5+3, 8) and (h-3, 8)?

OpenStudy (anonymous):

good. but what is the value of \[h\]?

OpenStudy (anonymous):

comparing to the standard form of the hyperbola?

OpenStudy (anonymous):

5+3, 8) and (5-3, 8)?

OpenStudy (anonymous):

super! so now write it well as points. get rid of the "+" sign

OpenStudy (anonymous):

2,8 and 8,8?:)

OpenStudy (anonymous):

can you find this in the possible answers? if you can, that's your answer ;)

OpenStudy (anonymous):

thankkks!

OpenStudy (anonymous):

its A :)

OpenStudy (anonymous):

you're welcome ;)

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