MCQ
The order of differential equation $\left(\frac{d^3 y}{d x^3}\right)^4+\left(\frac{d^2 y}{d x^2}\right)^2+\sin \left(\frac{d y}{d x}\right)+1=0$ is ___________ .
- ✓3
- B4
- C2
- Dundefined
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