perplexus.info :: Just Math : Powering

Powering (Posted on 2013-10-05)

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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| 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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