A = lo g 2 0 1 6 lo g 2 0 1 5 ⋯ lo g 3 lo g 2 2 3 . . . 2 0 1 5 2 0 1 6 or B = lo g 2 lo g 3 ⋯ lo g 2 0 1 5 lo g 2 0 1 6 2 0 1 6 2 0 1 5 . . . 3 2
Which of the above expressions is greater?
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
I solved it in 2 seconds !!!
Log in to reply
:P Yeah, it happens with those who have practised log a lot ;)
Nice problem
Problem Loading...
Note Loading...
Set Loading...
lo g n lo g n − 1 ⋯ lo g 3 lo g 2 2 3 . . . n − 1 n = lo g n lo g n − 1 ⋯ lo g 4 lo g 3 3 4 . . . n − 1 n lo g 2 2 = lo g n lo g n − 1 ⋯ lo g 5 lo g 4 4 5 . . . n − 1 n lo g 3 3 = lo g n lo g n − 1 ⋯ lo g 6 lo g 5 5 6 . . . n − 1 n lo g 4 4 ⋮ = lo g n lo g n − 1 ( n − 1 ) n = lo g n n lo g n − 1 n − 1 = 1
lo g 2 lo g 3 ⋯ lo g n − 1 lo g n n n − 1 . . . 3 2 = lo g 2 lo g 3 ⋯ lo g n − 2 lo g n − 1 n − 1 n − 2 . . . 3 2 lo g n n = lo g 2 lo g 3 ⋯ lo g n − 3 lo g n − 2 n − 2 n − 3 . . . 3 2 lo g n − 1 n − 1 = lo g 2 lo g 3 ⋯ lo g n − 4 lo g n − 3 n − 3 n − 4 . . . 3 2 lo g n − 2 n − 2 ⋮ = lo g 2 lo g 3 3 2 = lo g 2 2 lo g 3 3 = 1
So, even if we substitute n = 2 0 1 6 , Both are equal .