Answer:
first A(1) = -5
fourth A(4) = -135
eight A(8) = -10,935
Step-by-step explanation:
[tex]A(n)=-5\cdot3^{n-1}\\\\\text{put n = 1, n = 4 and n = 8 to the expression}\\\\A(1)=-5\cdot3^{1-1}=-5\cdot3^0=-5\cdot1=-5\\\\A(4)=-5\cdot3^{4-1}=-5\cdot3^3=-5\cdot27=-135\\\\A(8)=-5\cdot3^{8-1}=-5\cdot3^7=-5\cdot2,187=-10,935[/tex]
