Answer:
a1 = 4
a2 = 40
a3 = 400
a4 = 4000
Step-by-step explanation:
First substitute n with 1.
1. 4 ⋅ 10^1 - 1
4 ⋅ 10^0
4 ⋅ 1 = 4
Second substitute n with 2.
2. 4 ⋅ 10^2 - 1
4 ⋅ 10^1
4 ⋅ 10 = 40
Next substitute n with 3.
3. 4 ⋅ 10^3 - 1
4 ⋅ 10^2
4 ⋅ 100 = 400
Finally, substitute n with 4.
4. 4 ⋅ 10^4 - 1
4 ⋅ 10^3
4 ⋅ 1000 = 4000
It's simple. Just plug in 1, 2, 3, and 4 into n and solve the equation.
