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Allison112200 Allison112200
  • 18-04-2015
  • Mathematics
Answered

Help on complex numbers

1) what is the reciprocal of 6i

2) what is the additive inverse of -4+5i

3) find the multiplicative inverse of 2+i

4) find the reciprocal of -3+5i

5) find the magnitude of 5-12i

Verified Answer :

oytungunes oytungunes
  • 18-04-2015

1) 1/6i=-6i
2) - (-4+5i)=4-5i
3) 1/(2+i)=(2-i)/(4+1) = (2-i)/5
4)1/(-3+5i)=(-3-5i)/(9+25)
5) square root of ( 55 + 1212) = 13

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