Question 1111870
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<pre>
If  {{{1/x +1/y =10}}},  then   {{{(x+y)/xy}}} = 10.


Replace here (x+y) by 2, since it is given.


You will have  {{{2/(xy)}}} = 10,   which implies   xy = {{{2/10}}} = 0.2.
</pre>

Solved.


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In this case, please refer to the problem ID number 1111870.
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