The first volume of the eighth grade math exercise book has the following problems P48.

1。 Y=KX and Y=-X/5 are added to get two sets of values. Since the ordinate of p is 1, P( 1, -5) and M(- 1, 5) are calculated. Because point a is m and p is perpendicular to the x axis and y axis respectively, therefore,

2。 The length of MA is 10, and the length of AP is 2. The area of APM is 10.

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