perplexus.info :: Numbers : Powers of 2 vs some factorials

Powers of 2 vs some factorials (Posted on 2022-06-08)

Prove that equation
2^x-y! = 2
Has only 2 valid integer solutions.

Bonus: How about x²-y! = 2 ?

See The Solution Submitted by Ady TZIDON

Rating: 3.5000 (2 votes)

Comments: ( You must be logged in to post comments.)

Subject Author Date

D1 solution Math Man 2022-06-08 12:23:37

Solution Larry 2022-06-08 07:36:38

Puzzle Solution: Part B : Method 2 K Sengupta 2022-06-08 07:36:12

Puzzle Solution: Part B K Sengupta 2022-06-08 07:20:39

Puzzle Solution: Part A K Sengupta 2022-06-08 07:07:23

Please log in:

Login:
Password:
Remember me:

Sign up! \| Forgot password

Search:

Search body:

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