Product of two natural numbers is 3. Then, the sum of reciprocals of their squares is Choose the correct choice from the following choices:
A) 10/9 B) 1/289 C) 290/90 D) 290/19 E) None of these
Explanation:   If the numbers are a, b, then ab = 3,   as 3 is a prime number, so a = 1, b = 3.   1/a2+1/b2=1/1(2)+1/3(2)   1/ 2+1/ 2= 
<gadget id="calculator">1/ 2+1/ 2</gadget>
<output>1</output>
1/1(2)+1/3(2)=10/9   Option 10/9
<result>A</result>
Product of two natural numbers is 3. Then, the sum of reciprocals of their squares is