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OpenStudy (shamil98):
when i is put to an odd exponent you always get -i.
i^3 = -i
i^5 = -i
i^7 = -i
and so on.
OpenStudy (anonymous):
so it's just -i?
OpenStudy (shamil98):
yep.
OpenStudy (solomonzelman):
NO
OpenStudy (solomonzelman):
\[i^{16}~\times i\]
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OpenStudy (anonymous):
divide the exponent by 4 and look at the remainder. take i to that power and you'll have your answer
OpenStudy (shamil98):
oh oops
i^17 = i
forgot
i^16 = 1
OpenStudy (solomonzelman):
it's i
OpenStudy (anonymous):
Ok, when you have even numbers you always get -1. When you have odd you always get i. Therefore, i^16 * i = -1 * i
OpenStudy (anonymous):
no
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OpenStudy (anonymous):
i^3 = -i
i^4 = 1
i^2 = -1
OpenStudy (solomonzelman):
\[i^{4n}=1\]\[i^{4n+1}=i\]\[i^{4n+2}=-1\]\[i^{4n+3}=-i\]\[i^{4n+4}=i^{4n}=1\]YOU GET THE IDEA.
OpenStudy (anonymous):
ok thanks :)
OpenStudy (anonymous):
Snap! I messed up.
Solomon is right.. srry
OpenStudy (solomonzelman):
Anytime!
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OpenStudy (anonymous):
i^1 = i, i^2 = -1, i^3 = -i, i^4 = 1, etc
The pattern repeats, grouping them into groups of four.
Divide the exponent by 4 and take the remainder. Raise i to the power of remainder.
Since 17 divide by 4 yields remainder of 1,
i^17 = i^1 = i
answer: i @kiergurl5