Inequalities and linear Programming

2008-06-01 6:51 am
Solve the following compound inequalities and represent the solutions graphically.

(a) x< 1 and x< 5

(b) x≦3.7 and x > -1.6

(c) x≧9 / 7 and x≦ 1 / 3

(d) x≧ -2 and x≦ -2

(e) x< 3 / 4 and x ≦ 7 / 8

(f) x≧ -4 and x< -5
更新1:

&gE = 大過或等於 &lE = 小過或等於

回答 (1)

2008-06-03 9:16 pm
✔ 最佳答案
(a) x< 1 and x< 5
(-infinity, 1)

(b) x&lE;3.7 and x > -1.6
(-1.6, 3.7]

(c) x&gE;9 / 7 and x&lE; 1 / 3
No solution

(d) x&gE; -2 and x&lE; -2
x = -2

(e) x< 3 / 4 and x &lE; 7 / 8
(-infinity, 3/4)

(f) x&gE; -4 and x< -5
No solution


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