MCQ
General solution of `(x + y)^2 ("d"y)/("d"x) = "a"^2, "a" ≠ 0` is ______. (c is arbitrary constant)
- ✓`tan (y + "c")/"a" = (x + y)/"a"`
- B`x/"a" = tan y/"a" + "c"`
- Ctan xy = c
- Dtan (x + y) = c
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