MCQ
If $x =2 at ^2, y =4 at$, then $\frac{d y}{d x}=$ ?
- A$-\frac{1}{2 a t^2}$
- B$\frac{1}{2 a t^3}$
- ✓$\frac{1}{t}$
- D$\frac{1}{4 a t^3}$
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