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anonymous
 one year ago
7. The equation of a curve is xy=10 and the equation of a line l is 2x+y=q, where q is a number.
(i) Find the set of values of q for which l does not intersect the curve.
I am on the right track I think but I don't know how to get the answer. I will upload a picture of my working out but basically I got q<square root of 80 (which I incorrectly worked out to be 8.9 and used that but anyway).
anonymous
 one year ago
7. The equation of a curve is xy=10 and the equation of a line l is 2x+y=q, where q is a number. (i) Find the set of values of q for which l does not intersect the curve. I am on the right track I think but I don't know how to get the answer. I will upload a picture of my working out but basically I got q<square root of 80 (which I incorrectly worked out to be 8.9 and used that but anyway).

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and the actual answer is \[\sqrt{80}<q<\sqrt{80}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So basically I don't know why this is the answer or how to get it. Please help!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The coordinates that I marked are from a previous question. But thats my working out

zpupster
 one year ago
Best ResponseYou've already chosen the best response.0yes that is correct https://www.desmos.com/calculator/m3ynz8wrtz

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So are you saying that their answer is just a different form of mine?
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