已知不等式组3(2x-1)<2X+8. 2+〔3(X+1)〕>3-(X-1)÷4

2025-02-23 04:22:53
推荐回答(1个)
回答1:

解 :((1))

3(2x-1)<2X+8 (1)
2+〔3(X+1)〕>3-(X-1)÷4 (2)
由(1)得
6x-3<2x+8
4x<11
x<11/4
由(2)得
2+3x+3>3-(x/4-1/4)
3x+5>3-(x/4)+(1/4)
3x+(x/4)>3-5+(1/4)
13/4x>-6/4
13x>-6
x>-6/13
所以解集为-6/13
((2))
ax+b=x-2a
a(x-1)+2a=-b
a(x+1)=-b
a=(-b)/(x+1)

((3))
解2006a-1/2006a
=4024036a*a-1