MCQ
The function ${x^5} - 5{x^4} + 5{x^3} - 10$ has a maximum, when $x =$
- A$3$
- B$2$
- ✓$1$
- D$0$
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$f(x)=\frac{4 x^{3}-3 x^{2}}{6}-2 \sin x+(2 x-1) \cos x$