Chapter 7 - Exponents and Exponential Functions - Concept Byte - Page 454: 24

$A(1) = .5$ $A(4) = 13.5$ $A(8) = 1093.5$

$A(1) = .5*3^{n-1}$ $A(1) = .5*3^{1-1}$ $A(1) = .5*3^0$ $A(1) = .5*1 = .5$ $A(4) = .5*3^{n-1}$ $A(4) = .5*3^{4-1}$ $A(4) = .5*3^3$ $A(4) = .5*27 = 13.5$ $A(8) = .5*3^{n-1}$ $A(8) = .5*3^{8-1}$ $A(8) = .5*3^7$ $A(8) = .5*2187 = 1093.5$