Справочник Пользователя для HP 12c financial calculator

File name: hp 12c_user's guide_English_HDPMBF12E44 

Page: 35 of 209   

Printered Date: 2005/7/29   

Dimension: 14.8 cm x 21 cm 

 

 

The exchange of money in a problem is depicted by vertical arrows. Money you 
receive is represented by an arrow pointing up from the point in the time line when 
the transaction occurs; money you pay out is represented by an arrow pointing 
down. 

 

Suppose you deposited (paid out) $1,000 into an account that pays 6% annual 
interest and is compounded monthly, and you subsequently deposited an 
additional $50 at the end of each month for the next 2 years. The cash flow 
diagram describing the problem would look like this: 

 

The arrow pointing up at the right of the diagram indicates that money is received 
at the end of the transaction. Every completed cash flow diagram must include at 
least one cash flow in each direction. Note that cash flows corresponding to the 
accrual of interest are not represented by arrows in the cash flow diagram. 

The quantities in the problem that correspond to the first five keys on the top row of 
the keyboard are now readily apparent from the cash flow diagram. 

z

 

n is the number of compounding periods. This quantity can be expressed in 
years, months, days, or any other time unit, as long as the interest rate is 
expressed in terms of the same basic compounding period. In the problem 
illustrated in the cash flow diagram above, n = 2 × 12.