Partial Differential Equations | Equations Solvable by Direct Integration

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Equations Solvable by Direct Integration
Solve (𝜕^2 𝑧)/(𝜕𝑥^2 )+𝑧 = 0 given that when 𝑥 = 0, 𝑧 = 𝑒^𝑦and 𝜕𝑧/𝜕𝑥 = 1
Sove 𝑟 = (𝑎^2) 𝑧 given that when 𝑥=0, 𝜕𝑧/𝜕𝑥=𝑎𝑠𝑖𝑛𝑦 and 𝜕𝑧/𝜕𝑦 = 0.
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