Chapter 7 - Exponents and Exponential Functions - Concept Byte - Page 454: 21

First term: 4 Four term: 32 Eight term: 512

First Term: A(n) = 4 x 2$^{n-1}$ A(1) = 4 x 2$^{1-1}$ A(1) = 4 x 2$^{0}$ A(1) = 4 x 1 A(1) = 4 Fourth Term: A(n) = 4 x 2$^{n-1}$ A(4) = 4 x 2$^{4-1}$ A(4) = 4 x 2$^{3}$ A(4) = 4 x 8 A(4) = 32 Eight Term: A(n) = 4 x 2$^{n-1}$ A(8) = 4 x 2$^{8-1}$ A(8) = 4 x 2$^{7}$ A(8) = 4 x 128 A(8) = 512