| 摘要 |
PURPOSE:To graph and display a range of the solution of an inequality or a simultaneous inequality by a simple key operation, by providing a display buffer consisting of a text display buffer and a graph display buffer, etc., and a storage part, etc. CONSTITUTION:A display buffer 23 is constituted of a test display buffer 23a, a graph display buffer 23b, etc., brought to an address designation by the data which has been inputted through an address decoder 25 from a storage part 24, and the data from an operating part 21 is written. As a result, the buffer 23 outputs this data to a display part 26 and a display is executed. In this case, an inequality or a simultaneous inequality which has been inputted from a key input part 11 is graphed and displayed through a data memory 31 in the storage part 24, and a range memory 37 for storing a range data of a graphable numerical value, etc. That is to say, since a range of a solution of the inequality or the simultaneous inequality can be graphed and displayed by a simple key operation, the range of the solution can be confirmed visually. |
