Question

I’m really confused please help

Answer 1

Answer:

(2). b - (a + c)i

Step-by-step explanation:

$i^{7}$ = [( i )²]³ × i = ( - 1)³ i = - i

$i^{16}$ = $((i)^2)^{8} = ( - 1)^{8} = 1$

$((i)^2)^{10}$ × i = i

a(- i ) + b( 1 ) - c( i ) = - ai + b - ci = b - (a + c)i