Answer:
[tex]\boxed{1000}[/tex]
Step-by-step explanation:
The formula for the amount accrued [ƒ(x)] on an investment earning compound interest is
[tex]f(t) = P(1 + r)^{t}[/tex]
where
P = the amount of money invested (the principal)
r = the interest rate per payment period expressed as a decimal fraction
t = the number of periods
Your formula is
[tex]f(x) = 1000(1 + 0.05)^{x}\\\text{By comparison, we see that the term that represents the amount of money}\\\text{originally invested is $\boxed{\textbf{1000}}$}[/tex]
