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Always multiple (Posted on 2008-09-07) Difficulty: 2 of 5
Prove that for all integer values of x,

x9 - 6x7 + 9x5 - 4x3

is an exact multiple of 8,640.

See The Solution Submitted by pcbouhid    
Rating: 4.0000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionSolutionK Sengupta2008-09-07 13:14:50
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