Answer:
A .4,.04,.004,.0004
Step-by-step explanation:
an = 4 * (1/10)^n
Let n=1
a1 = 4 * 1/10 = 4/10 = .4
Let n=2
a2 = 4 * 1/10^2 = 4/100 = .04
Let n=3
a3 = 4 * 1/10^3 = 4/1000 = .004
Let n=4
a4 = 4 * 1/10^4 = 4/1000 = .0004
