Answer:
8) a, d, e
9) yes, he will have $5.75 (or 5 /34)
Step-by-step explanation:
A(n) = –3 • 2⁽ⁿ⁻¹⁾
for n = 1 , A₁ = -3.(2)⁰ = -3
for n = 2 , A₂ = -3.(2)¹ = -6
for n = 3 , A₃ = -3.(2)² = -12
for n = 4 , A₄ = -3.(2)³ = -24
...........................................
for n = 8 , A₈ = -3.(2)⁷ = -384
check the picture below.
now, if we split that triangle like so with that red line, we can use the right-triangle there, to get θ.
There are two real roots (5 and -5) and 4 imaginary roots