137.若ax + by + c = 0與x - y = 0垂直,且與x + ay + d = 0平行,試求a、b之值。(ab≠ 0)

詳解 (共 1 筆)

323233a
323233a
詳解 #4534266
2021/02/06
-a/b*1=-1-a/b=-1/a則a...
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