Question

Find the specified term in each sequence using the Geometric Explicit Formula

Answer 1

a7 = 4

Explanation:

r = a2/a1 = -128/256 = -1/2

an = a1·r^(n-1)

a7 = 256·(-1/2)^(7-1) = 256·(1/64)

a7 = 4