if the sum of two numbers is 45 and the h . c . f and l . c . m of these numbers are 4 and 5 respectively , then the product of the reciprocals is equal to :
"let the numbers be a and b . then , a + b = 45 and ab = 5 * 4 = 20 . required product = 1 / a * 1 / b = 1 / ab = 1 / 20 = 1 / 20 . answer : e"
divide(add(4, 5), multiply(4, const_100.0))