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Let k be a positive real number. The line x + y = k and the circle x^2 + y^2 = k are drawn. Find k so that the line is tangent to the circle.

 Sep 2, 2020
 #1
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K = 2.

 

I found this on quora. Look there for a VERY detailed explanation.

https://www.quora.com/Let-k-be-a-positive-real-number-The-line-x-y-k-and-the-circle-x-2-y-2-k-are-drawn-What-is-k-so-that-the-line-is-tangent-to-the-circle

 Sep 2, 2020
 #2
avatar+232 
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Oh ok thanks for the link! laugh

Weiart000  Sep 2, 2020

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