A) \[\sqrt{2K}\]
B) \[3K\]
C) \[\frac{4}{3}K\]
D) \[\frac{2}{3}K\]
Correct Answer: C
Solution :
\[K=\frac{2{{K}_{1}}{{K}_{2}}}{{{K}_{1}}+{{K}_{2}}}=\frac{2.K.2K}{K+2K}=\frac{4}{3}K\]
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