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20 votes
20 votes
Giải bất phương trình
a)2x+1/2x+2<1
b)1/x+4<1/x-2

User RyanNerd
by
3.1k points

1 Answer

25 votes
25 votes

Answer:


a)x < - (2)/(5)


b)4 < - 2

Explanation:


a)2x + (1)/(2) x + 2 < 1


= 4x + x + 4 < 2


= 5x + 4 < 2


= 5x < 2 - 4


= 5x < - 2


= x < - (2)/(5)


= x < - 0.4 * ∈( - \infty . - (2)/(5) )


b) (1)/(x) + 4 < (1)/(x) - 2


= (1)/(x) + 4 < (1)/(x) - 2.x≠0


= 4 < - 2

= X

User Szymon Toda
by
3.2k points
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