I 7-4X I ≤9 CARA KERJA Dn hp

Question

Matematika Diposting : 2017-10-04 Diupdate : 2021-08-18 Royalpopcorn

Pertanyaan

I 7-4X I ≤9
CARA KERJA Dn hp

Answer 1

|7-4x|≤9
7-4x ≤9
4x ≤9-7
4x≤2
x ≤2/4
x≤1/2
jadi x ≤1/2
hp {....,1/4,1/2}

Answer 2

•|7-4x| ≤ 9
7-4x ≤ 9
-4x ≤ 9-7
-4x ≤ 2
x ≤ 2/-4
x ≤ -½

•|7-4x| ≥ -9
7-4x ≥ -9
-4x ≥ -9-7
-4x ≥ -16
x ≥ -16/-4
x ≥ 4

HP = {x| x ≤ -½ & x ≥ 4}