MCQ
यदि $y=\cos ^{-1} x^3$ तब $\frac{d y}{d x}=$ ?
- A$\frac{-1}{(1+x)}$
- B$\frac{2}{\sqrt{(1+x)}}$
- C$\frac{-1}{2 \sqrt{x(1+x)}}$
- ✓इनमें से कोई नहीं
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