Question

1.若3（4x-2）=3x-4m的解大于2,求m的取值范围

Answer 1

1.3(4x -2) = 3x - 4m

12x - 6 = 3x - 4m

9x = 6 - 4m

x = (6 - 4m)/9

令x> 2 即 (6 - 4m)/9> 2

m < -3

2.ax > 7x + a + 1

(a - 7)x > a + 1

a＜7时 (a - 7)=0

[ 1加（减）根号下（1-16+12m）]/2>=0

[ 1加根号下（1-16+12m）]/2一定>=0

所以令

[ 1减根号下（1-16+12m）]/2>=0

解方程得

根号下0