Given that , find x^8 + .

*show working and explanation PLS (Clapping)

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- Dec 6th 2008, 11:46 PMmathbuoyfind the value of...
Given that , find x^8 + .

*show working and explanation PLS (Clapping) - Dec 7th 2008, 02:07 AMrunning-gag
- Dec 7th 2008, 02:18 AMMoo
Hello,

Note that

So you can divide by x on both sides, which will give :

so

Now, consider

This is equal to

Hence

Square it again :

Hence

Square it again :

hence - Dec 7th 2008, 08:19 AMrunning-gag
I was pretty sure there was a more simple answer than mine ! (Happy)