Casio FX-CG20 Manual

A SERVICE OF

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CASIO

7-4

• An error occurs if parameters are not configured correctly.

Use the following function menus to maneuver between calculation result screens.

• { REPEAT } … {parameter input screen}

• { GRAPH } … {draws graph}

After drawing a graph, you can press !1(TRACE) to turn on trace and read calculation

results along the graph.

Each press of e while trace is turned on cycles the displayed value in the sequence: present

value (

PV ) → simple interest ( SI ) → simple future value ( SFV ). Pressing d cycles in the

reverse direction.

Press J to return to the parameter input screen.

3. Compound Interest

This calculator uses the following standard formulas to calculate compound interest.

u PV, PMT, FV, n

I % ≠ 0

PMT =

PV + × FV

β

α

–

FV =

β

α

PV + × PMT

–

n =

log

(1+ iS) × PMT – FV × i

(1+ iS) × PMT + PV × i

{}

log (1+ i)

I % = 0

PV = ï (PMT × n + FV )

PMT = –

n

PV + FV

FV = ï (PMT × n + PV)

n =

PMT

PV + FV

–

= (1+ i × S) ×

, = (1 + i)

i

1 –

–n

β

β

α

0

.........Payment : End

(Setup Screen)

1

.........Payment : Begin

(Setup Screen)

i =

100

I%

I%

(1+ ) –1

C/Y

P/Y

100 × [C/Y ]

............................... (P/Y = C/Y = 1)

(Other than

those above)

{

S =

.....

{

PV =

– (α × PMT + × FV)

β

PV =

– (α × PMT + × FV)

β