A) \[d\,\left( \frac{{{\mu }_{1}}{{\mu }_{2}}}{{{\mu }_{1}}+{{\mu }_{2}}} \right)\]
B) \[d\,\left( \frac{1}{{{\mu }_{1}}}+\frac{1}{{{\mu }_{2}}} \right)\]
C) \[2d\,\left( \frac{1}{{{\mu }_{1}}}+\frac{1}{{{\mu }_{2}}} \right)\]
D) \[2d\,\left( \frac{1}{{{\mu }_{1}}{{\mu }_{2}}} \right)\]
Correct Answer: B
Solution :
\[{h}'=\frac{{{d}_{1}}}{{{\mu }_{1}}}+\frac{{{d}_{2}}}{{{\mu }_{2}}}=d\left( \frac{1}{{{\mu }_{1}}}+\frac{1}{{{\mu }_{2}}} \right)\]You need to login to perform this action.
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