Activities 107
Summary
Note that zc is zero for each of the function values in steps 7–9. Thus, the
complex zeros 1,Li, i of the polynomial x
3
Nx
2
+xN1 can be visualized with
the three points where the graph of the modulus surface touches the xy
plane.
Solving a Standard Annuity Problem
This activity can be used to find the interest rate, starting principal,
number of compounding periods, and future value of an annuity.
Finding the Interest Rate of an Annuity
Perform the following steps to find the interest rate (i) of an annuity
where the starting principal (
p) is 1,000, number of compounding periods
(n) is 6, and the future value (s) is 2,000.
9. Use the Trace tool to explore the function
values at x=0 and y=1.
10. Use the Trace tool to explore the function
values at x=0 and y=L1.
1. On the Home screen, enter the equation to
solve for
p.
2. Enter the equation to solve for
n.
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