If a and b are positive integers and their product is 3 times their sum, what is the value of 1/a + 1/b?
ab = 3(a+b) as the question suggesttsmith93 wrote:If a and b are positive integers and their product is 3 times their sum, what is the value of 1/a + 1/b?
so , dividing both side by ab , we get
1= 3(1/b+ 1/a) --> so 1/a + 1/b = [spoiler]1/3 Ans[/spoiler]
