Product of two natural numbers is 5. Then, the sum of reciprocals of their squares is Choose the correct choice from the following choices: A) 290/289 B) 26/25 C) 290/90 D) 290/19 E) None of these
Explanation:   If the numbers are a, b, then ab = 5,   as 17 is a prime number, so a = 1, b = 5.   1/a2+1/b2=1/1(2)+1/5(2)   1/ 2+1/ 2= 
<gadget id="calculator">1/ 2+1/ 2</gadget>
<output>1</output>
1/1(2)+1/5(2)=26/25   Option 26/25
<result>B</result>
Product of two natural numbers is 5. Then, the sum of reciprocals of their squares is