Question

My answer is A


Simplify i18
Answers:

1

-1

-i

i

Answer 1

do u meant i^8 ?

Answer 2

is that \(i^{18}\) ?

Answer 3

yes @r0n4ld

Answer 4

\[i^18=(i^2)^9=1^9=1\]

Answer 5

yayyyy i was right

Answer 6

thanks guys you rock my socks

Answer 7

\[i^{18}=i^2 \cdot i^2 \cdot i^2 \cdot i^2 \cdot i^2 \cdot i^2\cdot i^2\cdot i^2\cdot i^2=(-1)^9=-1\] The answer is B

Answer 8

actually I did that wrong... it's -1.

Answer 9

\[i^{18} = (i^2)^9 = (-1)^9 = -1.\]

Answer 10

really? so i was wrong.

Answer 11

are you sure?

Answer 12

Yes. Look at @r0n4ld or my calculation.

Answer 13

thanks!