1行できませんでした。 x^2 + y^2 − 2x + ay = 0 ,x=3,y=-3 https://www.wolframalpha.com/input?i=x%5E2+%2B+y%5E2+%E2%88%92+2x+%2B+ay+%3D+0+%2Cx%3D3%2Cy%3D-3&lang=ja a = 4, y = sqrt(-x^2 + 2 x + 4) – 2 https://www.wolframalpha.com/input?i=a%3D4%2Cx%5E2+%2B+y%5E2+%E2%88%92+2x+%2B+ay+%3D+0+&lang=ja diff(sqrt(-x^2 + 2 x + 4) – 2),x=3 https://www.wolframalpha.com/input?i=diff%28sqrt%28-x%5E2+%2B+2+x+%2B+4%29+-+2%29%2Cx%3D3&lang=ja y-(-3)=2*(x-3) https://www.wolframalpha.com/input?i=y-%28-3%29%3D2*%28x-3%29&lang=ja
1行できませんでした。
x^2 + y^2 − 2x + ay = 0 ,x=3,y=-3
https://www.wolframalpha.com/input?i=x%5E2+%2B+y%5E2+%E2%88%92+2x+%2B+ay+%3D+0+%2Cx%3D3%2Cy%3D-3&lang=ja
a = 4, y = sqrt(-x^2 + 2 x + 4) – 2
https://www.wolframalpha.com/input?i=a%3D4%2Cx%5E2+%2B+y%5E2+%E2%88%92+2x+%2B+ay+%3D+0+&lang=ja
diff(sqrt(-x^2 + 2 x + 4) – 2),x=3
https://www.wolframalpha.com/input?i=diff%28sqrt%28-x%5E2+%2B+2+x+%2B+4%29+-+2%29%2Cx%3D3&lang=ja
y-(-3)=2*(x-3)
https://www.wolframalpha.com/input?i=y-%28-3%29%3D2*%28x-3%29&lang=ja