Question

efetue:
a) 3i^20-5i^18=

Answer 1

3i^20 - 5i^18

3.(i⁴)^5 - 5.(i⁴)⁴. i²

3.(1)^5 - 5.(1)⁴ . (-1)

3.1 - 5.1. (-1)

3 + 5

8 ✓

Answer 2

efetue:


a)

20÷4=5
-20
0
i^20=i^0=1

18÷4=4
-16
2

i^18=i^2=1



3i^20-5i^18=

=3.(1)-5.(1)

=3+5

=8


espero ter ajudado!

boa noite!