How many lattice points, whose coordinates are integers, are on circle (x + 1)^2 + (y - 2)^2 = 2? I believe the answer is 4?
Last edited by MATNTRNG; Jul 21st 2010 at 04:20 PM.
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Can you justify your answer? What if the RHS was 5^2?
Originally Posted by Ackbeet Can you justify your answer? What if the RHS was 5^2? I cannot. I used GeoGebra to graph the circle and it looks like the answer is four. However, I am starting to lean towards zero because the radius is not a real number. Any thoughts?
You are correct.
Look at the graph.
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