Question:
Mark $(\sqrt{)}$ against the correct answer in each of the following:
Which of the following is meaningless?
A. $\vec{a} \cdot(\vec{b} \times \vec{c})$
B. $\overrightarrow{\mathrm{a}} \times(\overrightarrow{\mathrm{b}} \cdot \overrightarrow{\mathrm{c}})$
C. $(\overrightarrow{\mathrm{a}} \times \overrightarrow{\mathrm{b}}) \cdot \overrightarrow{\mathrm{c}}$
D. none of these
Solution:
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