The function f(x) = 800(1.09)3x shows the growth due to interest that Jim earns on an investment.

The steps to calculate an equivalent function are shown below:




[Step 1]
f(x) = 800(1.09)3x


[Step 2]
f(x) = 800(1.093)x

[Step 3]
f(x) = 800(1.09 ⋅ 3)x

[Step 4]
f(x) = 800(3.27)x


Which of the following is the first incorrect step?
There is no mistake in the work.
Step 1
Step 2
Step 3
Step 4