Product of two natural numbers is 11. Then, the sum of reciprocals of their squares is	Choose the correct choice from the following answers:	A) 290/289	B) 122/121	C) 290/90	D) 290/19	E) None of these
Explanation:   If the numbers are a, b, then ab = 17,   as 17 is a prime number, so a = 1, b = 17.   1/a2+1/b2=1/1(2)+1/11(2)   1/ 2+1/ 2= 
<gadget id="calculator">1/ 2+1/ 2</gadget>
<output>1</output>
1/1(2)+1/11(2)=122/121   Option 122/121
<result>B</result>
Product of two natural numbers is 11. Then, the sum of reciprocals of their squares is