Solve the given third- or fourth-order differential equation.D3y + 2 D2y - 63 Dy = 0
A. y = c1e9x + c2e-7x
B. y = c1 + c2e-9x + c3e7x
C. y = c1 + c2e9x + c3e-7x
D. y = c1e-9x + c2e7x
Answer: B
Mathematics
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