A) \[{{x}_{1}}{{x}_{2}}\]
B) \[{{x}_{1}}{{x}_{2}}\]
C) \[{{x}_{1}}/{{x}_{2}}\]
D) None of these
Correct Answer: D
Solution :
Option [d] is correct. |
Explanation: \[u=f+{{x}_{1}}\] |
\[v=f+{{x}_{2}}\] |
\[f=uv/\ (u+v)\] |
\[or,\ f=\frac{(f+{{x}_{1}})(f+{{x}_{2}})}{(f+{{x}_{1}})+(f+{{x}_{2}})}\] |
\[or\ {{f}_{2}}={{x}_{1}}{{x}_{2}}\] |
\[\therefore f\sqrt{{{x}_{1}}{{x}_{2}}}\] |
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