Chapter 7 - Exponents and Exponential Functions - Concept Byte - Page 454: 23

$A(1) = 5$ $A(4) = -2.56$ $A(8) = -1.048576$

$A(1) = 5*(-.8)^{n-1}$ $A(1) = 5*(-.8)^{1-1}$ $A(1) = 5*(-.8)^0$ $A(1) = 5*1 = 5$ $A(4) = 5*(-.8)^{n-1}$ $A(4) = 5*(-.8)^{4-1}$ $A(4) = 5*(-.8)^3$ $A(4) = 5*-.512 = -2.56$ $A(8) = 5*(-.8)^{n-1}$ $A(8) = 5*(-.8)^{8-1}$ $A(8) = 5*(-.8)^7$ $A(8) = 5*-.2097152 = -1.048576$