Part BCSIR NET December 2024the-safe-line-is-where-the-data-vanishes

The safe line is where the data vanishes

The problem $\partial u / \partial x + \partial u / \partial y = u^{2}, u (x, 0) = x^{2}, \forall x \in R$ has a solution on an open set containing the line { $(x, y) \in R^{2}$ : ax + by = 0} if

A.a = 1 and b = 0
B.a = 1 and b = −1✓
C.a = 2 and b = 1
D.a = 1 and b = 2

You have the answer. Trap Analysis is why the other three were written.

Not a worked solution repeated four times — the specific reasoning error each wrong option was built to reward.

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The safe line is where the data vanishes

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