perplexus.info :: Just Math : An Atypical Evaluation

An Atypical Evaluation (Posted on 2006-08-13)

Determine all possible positive integers x and y such that 3^x-2^y=17.

See The Solution Submitted by K Sengupta

Rating: 4.0000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

Analytical solution

| Comment 3 of 6 |

Step 1: 3^x/3^x - 2^y/3^x = 17/3^x

Step 2: Then a miracle happens.

Step 3: x-4 = 0
y-6 = 0

Step 4: x=4 and y=6

Posted by Hugo on 2006-08-14 11:01:45

Please log in:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info