Question

蘇顏珞

求過程，謝謝

7. 設圓C:x+y+ ax-y+b=0 與直線L:x+3y+c=0相切於點(-1.2),則序對(a,b,c)=
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Answer 1

Call me Bravo

For your reference

蘇顏珞

Thank you！But c=-5

Call me Bravo

You got me! Sorry, it’s my bad.