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Prime as sum of Cubes of terms of AP? (Posted on 2008-03-02) Difficulty: 2 of 5
Let Si be the ith term of an Arithmetic Progression whose 1st term is a and common difference d. Show that for any 2 positive integers m,n(>m), Σ(i:m to n)(Si)3 can't be a prime number.

Note: a,d are positive integers.

See The Solution Submitted by Praneeth    
Rating: 3.3333 (3 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re official solution -- IS NOT PERFECTAdy TZIDON2008-03-08 19:45:10
Hints/Tipshint- no spoilerAdy TZIDON2008-03-07 07:41:28
Some Thoughtsanother humble step forwardAdy TZIDON2008-03-06 12:42:29
A humble startAdy TZIDON2008-03-03 16:31:20
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