THE LINE THROUGH A(4,7) WITH GRADIENT m MEETS X AXIS AT P AND Y AXIS AT R THE LINE THROUGH B(8,3) WITH GRADIENT -1/m meets the x axis at q and y axis at s FIND IN THE TERMS OF m, THE CO ORDINATE OF P,Q,R,S .OBTAIN EXPRESSION FOR OP.OQ AND OR.OS WHERE O IS THE POINT (0,0)

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