Question

(iii) \( a_{n}=(-1)^{n-1} \times 2^{n+1} \)

Answer 1

text book answer sheet shows that the answer will be 4,-8,16,-32...

Answer 2

lalruatpu117122, hello

I am not sure what you are asking us to do here...

a₁ = (-1)⁰ x 2² = 4

a₂ = (-1)¹ x 2³ = -8

a₃ = (-1)² x 2⁴ = 16

a₄ = (-1)³ x 2⁵ = -32

Please let me know if this helps...