Question

if 1/x 1/y =4/9, and xy=27. find x3+y3​

Answer 1

Answer:

756

Step-by-step explanation:

First we need to find x+y from 1/x+1/y with the help of given value of xy i.e 27. then we can use the formula of a^3+b^3 = (a+b) ^3-3ab(a+b) and put the value of x+y ie 13 and xy ie 27. Have fun.