product of two natural numbers is 19 . then , the sum of reciprocals of their squares is
explanation : if the numbers are a , b , then ab = 19 , as 17 is a prime number , so a = 1 , b = 19 . 1 / a 2 + 1 / b 2 = 1 / 1 ( 2 ) + 1 / 19 ( 2 ) = 362 / 361 option d
add(power(divide(const_1, const_1), const_2), power(divide(const_1, 19), const_2))