| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic calculator allowing analysis of an area of a solution of a high-degree inequality in associating a factorization type solution table and a graph corresponding to an equation wherein the inequality is converted into an equality. SOLUTION: When inputting the factorization type inequality '(x+2)(x-3)>0' corresponding to a quadratic inequality in an inequality input screen G, the solution table T and the graph F are generated, and a cell "Rn" performed with reverse display h movable according to cursor operation is designated on the solution table T. A sign set in a reverse indication cell "R1" of 'f(x)' smaller than a solution a 'X=-2' of one factor 'x+2' of the inequality is positive (+), a graph area Q corresponding thereto is a positive side, and each is displayed in an adaptable color (blue), so that it can be clearly understood and be learned that the reverse designation cell "R1" of the solution table T and the graph area Q of the graph F are included in the area of the solution of the inequality. COPYRIGHT: (C)2011,JPO&INPIT |
