SOLUTION: on page 280 of the algebra 2 book problem 5 reads i^40 i cant figure out how to solve it...

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Question 361631: on page 280 of the algebra 2 book problem 5 reads i^40 i cant figure out how to solve it...
Found 3 solutions by shorty4aboo, jrfrunner, Alan3354:
Answer by shorty4aboo(8)   (Show Source): You can put this solution on YOUR website!
is a problem in its self the reason why i say this is because my teacher taught us a method to use for degree of i...here it is:
ex: Evaluate
533 divided by 4 = 133 R(1)
Now this tells you That the Remainder is 1, Use that with this chart:





As you can see ; Odd degree numbers =i and even degree numbers= -1.

NOW HERE IS YOUR PROBLEM WORKED OUT:

See No remainder so you would have degree 0, then plug it into chart and the answer is 0.

Hope this has helped you out.

Answer by jrfrunner(365)   (Show Source): You can put this solution on YOUR website!
cycles in factors of 4
--






and as you can see values recycle based on xmod(4) (ie the remainder of dividing by 4)
So since you want to know and since 40mod(4)=0 then

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
i^40
-----




----
It's cyclic
i, -1, -i, 1 etc.
---


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