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FP2 help

can someone explain how the answer here concludes with "hence 2x + y = 5"

I don't see it, I'm fine with every step until that

Screen Shot 2016-05-20 at 20.26.49.png
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Avatar for Zacken
Zacken
22
Original post by marinara pizza
can someone explain how the answer here concludes with "hence 2x + y = 5"

I don't see it, I'm fine with every step until that



Can you show us the full question?
Original post by Zacken
Can you show us the full question?


Screen Shot 2016-05-20 at 20.44.34.png
Reply 3
Avatar for Zacken
Zacken
22
Original post by marinara pizza
Screen Shot 2016-05-20 at 20.44.34.png


The wording is misleading, it's not "hence", it's just:

You have x and y in terms of u and v and the question gives you 2x+y=52x+y = 5 so replace x and y with their functions of u and v to get an equation which you can then simplify to show is a circle.

i.e: you're given 2x+y=5 and not derived it. You want to show that 2x+y is transformed to a circle.
Original post by Zacken
The wording is misleading, it's not "hence", it's just:

You have x and y in terms of u and v and the question gives you 2x+y=52x+y = 5 so replace x and y with their functions of u and v to get an equation which you can then simplify to show is a circle.

i.e: you're given 2x+y=5 and not derived it. You want to show that 2x+y is transformed to a circle.


oh right i see, thanks !

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