50 Ways to Worry Less Now: Reject Negative Thinking to Find Peace, Clarity, and Connection

50 Ways to Worry Less Now: Reject Negative Thinking to Find Peace, Clarity, and Connection

Matematika Sekolah Menengah Atas himpunan penyelesaian dari
|x + 4| ^ 2 >= - 4|x + 4| + 12 = 0​

himpunan penyelesaian dari
|x + 4| ^ 2 >= - 4|x + 4| + 12 = 0​

Jawab:

nilai mutlak

|x + 4| ^ 2≥ - 4|x + 4| + 12

misal | x + 4| =  a

a²  ≥ -4a  + 12

a² + 4a - 12  ≥ 0

(a + 6)(a - 2)  ≥ 0

a  ≤ -  6  atau a ≥ 2

i.  |x - 4| ≤ -  6  (tidak ada solusi x)
karena nilai  negatif

ii. |x + 4|  ≥ 2
x + 4  ≤ - 2  atau  x +  4  ≥ 2
x ≤ - 6  atau  x ≥ - 2

maka HP  |x + 4| ^ 2≥ - 4|x + 4| + 12
HP = {x | x ≤ - 6  atau  x ≥ - 2,  x ∈ R}

[answer.2.content]