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Powering (Posted on 2013-10-05) Difficulty: 3 of 5
Given that a,b,x and y are real numbers such that

a+b=23
ax+by=79
ax2+by2=217
ax3+by3=691

Determine ax4+by4

No Solution Yet Submitted by Danish Ahmed Khan    
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No Subject | Comment 4 of 5 |
Wow!  Very nice solution, xdog.   I especially like that you never solved for {x,y}

Edited on October 7, 2013, 10:14 pm
  Posted by Steve Herman on 2013-10-07 22:12:54

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