一道very very very easy的数学题
问题描述：
一道very very very easy的数学题
1）已知直线y= -x+b的图像与x轴、y轴围成的三角形的面积是8.
(请附详细过程,谢谢!)
答
直线与x轴交点为(b,0) 与y轴交点为(0,b)
S=1/2*b*b=8
推得b=4或者-4
所以y=-x+4 或者y=-x-4
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