Question:
Mark $(\sqrt{)}$ against the correct answer in the following:
The function $f(\mathrm{x})=\mathrm{x}^{3}-27 \mathrm{x}+8$ is increasing when
A. $|\mathrm{x}|<3$
B. $|\mathrm{x}|>3$
C. $-3 D. none of these
Solution:
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