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The order of the differential equation d²y/dt² + (dy/dt)³ + y⁴ = e^(−t) is

1. 1
2. 2
3. 3
4. 4

Correct answer: 2

Solution

The order of a differential equation is determined by the highest derivative present. In this case, the highest derivative is the second derivative, d²y/dt², which indicates that the order of the equation is 2.

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