MCQ
The number of binary operations that can be defined on a set of $2$ elements is:
- A$8$
- B$4$
- ✓$16$
- D$64$
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$f\left( x \right) = \int_1^x {\left\{ {2\left( {t - 1} \right){{\left( {t - 2} \right)}^3} + 3{{\left( {t - 1} \right)}^2}{{\left( {t - 2} \right)}^2}} \right\}} dt$ is maximum when $x$ is equal to