Question

d(1)=8

d(n)=d(n-1) x (-5)

what is the 3rd term in the sequence?

Answer 1

Answer:

a₃ = -88

Step-by-step explanation:

d(1)=8

or a₁ = 8

d(n)=d(n-1) x (-5)=-5d(n-1)

n=2

a₂ = -5 × a(₂-₁) = -5 × a₁ = -5 × 8

a₂ = -40

Now, d = a₂-a₁= -40- 8 = -48

aₙ = a + (n-1)d

a₃ = 8 + (3-1)(-48) = 8 - 96

a₃ = -88

Answer 2

Answer:

200

Step-by-step explanation:

d(1)=8

d(2)=d(1)*(-5)=-40

d(3)=d(2)*(-5)=200