anonymous
  • anonymous
Solve 5+8i-4+2i
Mathematics
schrodinger
  • schrodinger
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apoorvk
  • apoorvk
Simply add/subtract the real and imaginary parts separately and express in "a+ib" form!
anonymous
  • anonymous
so 1+10i?
lgbasallote
  • lgbasallote
^that's right

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apoorvk
  • apoorvk
yeah correct-o!
anonymous
  • anonymous
wat about i7? 7 is an exponent
apoorvk
  • apoorvk
you mean \(\iota^7\) right?
anonymous
  • anonymous
yea i guess
apoorvk
  • apoorvk
okay do you know that i^2 =-1, i^3=-i, i^4=1, i^5=i again, i^6=-i... and so on? what would i^7 be according to this trend?
anonymous
  • anonymous
-1?
lgbasallote
  • lgbasallote
here's a hint for you!! if the exponent is odd (except for 3) the answer is -i if the exponent is even (other than 2) the answer is 1
anonymous
  • anonymous
ohk so its -i
apoorvk
  • apoorvk
yes -i!
anonymous
  • anonymous
ohk thnx!
apoorvk
  • apoorvk
anytime!

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