若点(a,3)到直线4x-3y+1=0的距离是4,且点怕p在不等式2x+y
问题描述:
若点(a,3)到直线4x-3y+1=0的距离是4,且点怕p在不等式2x+y
答
|4a-9+1|/5 =4 a=7 或者a=-9 p在不等式2x+y
若点(a,3)到直线4x-3y+1=0的距离是4,且点怕p在不等式2x+y
|4a-9+1|/5 =4 a=7 或者a=-9 p在不等式2x+y